{"title":"Massief koper","description":"\u003cp\u003eMassief koper is koper van buiten tot binnen. Er zit geen kern van staal, aluminium of kunststof onder een dun laagje koper. Alle producten in deze collectie zijn op die manier gemaakt.\u003c\/p\u003e\n\u003ch2\u003eMassief tegenover verkoperd\u003c\/h2\u003e\n\u003cp\u003eVeel goedkope producten zijn verkoperd: een ander metaal met een dunne laag koper erop. Na een tijd slijt die laag en komt het onderliggende metaal tevoorschijn. Bij massief koper kan dat niet, want onder het oppervlak zit hetzelfde metaal. Meer over dat verschil staat bij \u003ca href=\"\/collections\/echt-koper\"\u003eecht koper\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eGewicht als eerste aanwijzing\u003c\/h2\u003e\n\u003cp\u003eKoper is zwaar. Een massief koperen fles of piramide voelt zwaarder dan je verwacht als je hem voor het eerst oppakt. Dat gewicht is een van de makkelijkste manieren om massief koper te herkennen, zonder gereedschap.\u003c\/p\u003e\n\u003ch2\u003ePoetsen zonder zorgen\u003c\/h2\u003e\n\u003cp\u003eOmdat er geen laagje is, kun je massief koper poetsen zo vaak als je wilt. Je poetst nooit door een bovenlaag heen. Daardoor blijft een massief stuk jarenlang mooi, ook als het dagelijks wordt gebruikt. Hoe het met de tijd verandert, zie je bij \u003ca href=\"\/collections\/koper-mooier-met-de-tijd\"\u003ekoper dat mooier wordt met de tijd\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWaar ons koper vandaan komt\u003c\/h2\u003e\n\u003cp\u003eHet koper wordt in een werkplaats in India verwerkt tot drinkgerei, sieraden en piramides. Meer over het materiaal lees je in waar ons koper van gemaakt is. Over de zuiverheid lees je bij \u003ca href=\"\/collections\/puur-koper\"\u003epuur koper\u003c\/a\u003e, over de afwezigheid van een beschermlaag bij \u003ca href=\"\/collections\/ongecoat-koper\"\u003eongecoat koper\u003c\/a\u003e. Het hele assortiment staat bij \u003ca href=\"\/collections\/all\"\u003ealle producten\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"kopero-koperen-tensorring","title":"Kopero Copper Tensor Ring","description":"\u003cp\u003eThe tensor ring is a closed ring of solid copper, 4 centimetres across. You slide it just above the spout of your kitchen tap, where it stays put without anything to fasten. The water moves through the open centre; the ring does not touch it.\u003c\/p\u003e\u003cp\u003eIt does not have to go on the tap. \u003ca href=\"\/blogs\/knowledge-base\/how-to-use-a-tensor-ring\"\u003eUsing it loose\u003c\/a\u003e works just as well: beside a water bottle or a glass, next to a small personal object, on your desk or simply in your hand.\u003c\/p\u003e\u003cp\u003eThose 4 centimetres are the visible diameter of the closed ring. The measure this tradition is built on is a different one: the length of copper wire the maker measures out before bending it into a loop, the sacred cubit. Kopero uses a compact fraction of it, so the ratio holds and the ring still fits a tap. \u003ca href=\"\/blogs\/knowledge-base\/sacred-cubit-lost-cubit-and-new-cubit-explained\"\u003eSacred Cubit, Lost Cubit and New Cubit\u003c\/a\u003e explains those measures, and \u003ca href=\"\/blogs\/knowledge-base\/tensor-rings-who-was-slim-spurling-and-what-did-he-claim\"\u003ewho was Slim Spurling\u003c\/a\u003e tells you where the modern ring comes from.\u003c\/p\u003e\u003cp\u003eWhy copper and not some other metal? Copper is the yardstick the world measures electrical conductivity against: the international unit, IACS, is literally defined on a piece of annealed copper wire, and of all metals only silver conducts better. That this tradition bends copper wire in particular follows from that. How the conduction works physically is in \u003ca href=\"\/blogs\/knowledge-base\/why-copper-conducts\"\u003ewhy copper conducts\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eThat same conductivity is why an MRI room is lined with copper sheet and why the lightning protection standard specifies copper. Where the engineering turns into tradition is in \u003ca href=\"\/blogs\/knowledge-base\/copper-shielding-and-earthing\"\u003ecopper as a shield\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\u003cp\u003eA tensor ring works with shape, not with filtration. It removes nothing from the water and does not take the place of a filter, but it sits happily alongside one: purifying and structuring are two different things. Where the idea comes from that a closed copper form does something is set out in \u003ca href=\"\/blogs\/knowledge-base\/shape-power-how-form-focuses-energy\"\u003eShape Power\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eIf your spout is thicker than 4 centimetres, use the ring loose rather than prising it open. Copper is pliable, and opening it up changes the very measure the ring was made to.\u003c\/p\u003e\u003cp\u003eAbove the sink it gets water and steam every day, so you will see the discolouration there sooner than on a ring that sits on a desk. Polish it now and then with lemon and salt (not too hard: salt is mildly abrasive and dissolves well in the lemon juice) and dry it straight away. \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003eWhy is my copper turning green or black\u003c\/a\u003e explains what that colour means.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Default Title","offer_id":54696164196693,"sku":"8720726791410","price":24.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-tensorring-1.jpg?v=1791102152"},{"product_id":"kopero-premium-koperen-tongschraper","title":"Kopero Copper Tongue Scraper","description":"\u003cp\u003eThe tongue scraper is a small curved instrument you draw across your tongue in the morning, before you eat, drink or brush your teeth. That is when the coating is still there. It is one of the oldest parts of the Ayurvedic morning routine, and where that comes from is in \u003ca href=\"\/blogs\/knowledge-base\/the-ayurvedic-tongue-scraper-a-centuries-old-morning-ritual\"\u003ethe article on Jihva Prakshalana\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eThe shape does the work. You hold it at both ends, place it as far back as feels comfortable and pull it forward in one steady stroke, three to five times. The curve follows the width of your tongue and the edges are rounded, exactly as the Charaka Samhita prescribed: curved and not sharp.\u003c\/p\u003e\u003cp\u003eFor the movement itself the material matters little; after that, copper and stainless steel part ways. Copper is naturally antibacterial, and it is the metal the classical text names outright; stainless steel did not yet exist. \u003ca href=\"\/blogs\/knowledge-base\/copper-or-stainless-steel-tongue-scraper\"\u003eCopper or stainless steel tongue scraper\u003c\/a\u003e puts the two side by side.\u003c\/p\u003e\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\u003cp\u003eLight pressure is enough. Stop if you feel pain or irritation or have any sores, and do not use the scraper on a damaged or inflamed tongue.\u003c\/p\u003e\u003cp\u003eRinse it under the tap after every use and dry it straight away. If it goes dull, a slice of lemon with salt (not too hard: salt is mildly abrasive and dissolves well in the lemon juice) brings the shine back; the other options are in \u003ca href=\"\/blogs\/knowledge-base\/cleaning-copper-baking-soda-vinegar-lemon\"\u003ecleaning copper\u003c\/a\u003e. Otherwise do not share it, no more than you would a toothbrush.\u003c\/p\u003e\u003cp\u003eAnd it discolours. Uncoated copper reacts to air and moisture and turns darker. It polishes back, and it is at the same time the best proof that there is no lacquer over it: a coated scraper would never discolour. What discolouration does and does not mean is in \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003ewhy is my copper turning green or black\u003c\/a\u003e.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Default Title","offer_id":54696174616917,"sku":"8720726791533","price":24.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-tongschraper-1.jpg?v=1791102152"},{"product_id":"kopero-koperen-piramide-energizer-gedraaid","title":"Kopero Copper Pyramid Energizer Twisted","description":"\u003cp\u003eAn open pyramid of twisted copper wire: four equal triangles meeting at a single point, with 60 degree angles. There is nothing inside it and nothing around it, so you put something underneath and leave it there. \u003ca href=\"\/blogs\/knowledge-base\/how-to-use-a-copper-pyramid\"\u003eHow to use it\u003c\/a\u003e is set out step by step in the knowledge base.\u003c\/p\u003e\u003cp\u003eYou choose between 14.56 and 23.56 centimetres, and that is no arbitrary difference: the two sizes stand in almost exactly the golden ratio. The small one fits a desk, an altar or a bedside table and is meant for a single piece of jewellery, a crystal or a written intention. The large one makes room for a glass of water, several stones, herbs or fruit.\u003c\/p\u003e\u003cp\u003eIn the twisted version the copper runs up each edge as a visible spiral. The pyramid draws the large line to the apex, and the twist lays a second, finer movement over it. If you would rather have calm, unbroken edges, there is the \u003ca href=\"\/products\/kopero-copper-pyramid-energizer-smooth\"\u003esmooth pyramid\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eWhere the idea that shape does something comes from, and what of it was visible in the lab, is in \u003ca href=\"\/blogs\/knowledge-base\/shape-power-how-form-focuses-energy\"\u003eShape Power\u003c\/a\u003e and in \u003ca href=\"\/blogs\/knowledge-base\/pyramid-energy-from-a-french-trader-to-russian-fibre-optic-giants\"\u003ethe history of pyramid energy\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\u003cp\u003eAlign one side with a compass to the north-south axis and then leave it be. In the Manipal studies the shape did its work precisely at that alignment; if you move it, align it again.\u003c\/p\u003e\u003cp\u003ePick the pyramid up by the base, not by the apex. The edges are copper and therefore pliable, and at the point all the weight rests in one place.\u003c\/p\u003e\u003cp\u003eThe copper discolours over the years, and that polishes back with lemon and salt (not too hard: salt is mildly abrasive and dissolves well in the lemon juice). Do it gently, following the direction of the twist. \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003eWhy is my copper turning green or black\u003c\/a\u003e explains what you do and do not need to do.\u003c\/p\u003e\u003cp\u003eWhat we can hand you is the source. The tradition runs from Bovis through Drbal to Golod, and at Manipal University peer-reviewed animal studies found lower stress hormones under a pyramid model than in a cube of the same dimensions: the shape did the work, not the shelter. What you experience yourself comes on top of that.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Small (14.56 cm)","offer_id":54696183824725,"sku":"8720726791489","price":39.95,"currency_code":"EUR","in_stock":false},{"title":"Large (23.56 cm)","offer_id":54696183857493,"sku":"8720726791403","price":49.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-piramide-gedraaid-klein-1.jpg?v=1791102152"},{"product_id":"kopero-koperen-piramide-energizer-glad","title":"Kopero Copper Pyramid Energizer Smooth","description":"\u003cp\u003eAn open pyramid of copper edges: four equal triangles meeting at a single point, with 60 degree angles. There is nothing inside it and nothing around it, so you put something underneath and leave it there. \u003ca href=\"\/blogs\/knowledge-base\/how-to-use-a-copper-pyramid\"\u003eHow to use it\u003c\/a\u003e is set out step by step in the knowledge base.\u003c\/p\u003e\u003cp\u003eYou choose between 14.56 and 23.56 centimetres, and that is no arbitrary difference: the two sizes stand in almost exactly the golden ratio. The small one fits a desk, an altar or a bedside table and is meant for a single piece of jewellery, a crystal or a written intention. The large one makes room for a glass of water, several stones, herbs or fruit.\u003c\/p\u003e\u003cp\u003eIn the smooth version the edges run calmly and unbroken to the apex, so the geometry itself carries the look. If you also want a visible spiral movement in the copper, there is the \u003ca href=\"\/products\/kopero-copper-pyramid-energizer-twisted\"\u003etwisted pyramid\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eWhere the idea that shape does something comes from, and what of it was visible in the lab, is in \u003ca href=\"\/blogs\/knowledge-base\/shape-power-how-form-focuses-energy\"\u003eShape Power\u003c\/a\u003e and in \u003ca href=\"\/blogs\/knowledge-base\/pyramid-energy-from-a-french-trader-to-russian-fibre-optic-giants\"\u003ethe history of pyramid energy\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\u003cp\u003eAlign one side with a compass to the north-south axis and then leave it be. In the Manipal studies the shape did its work precisely at that alignment; if you move it, align it again.\u003c\/p\u003e\u003cp\u003ePick the pyramid up by the base, not by the apex. The edges are copper and therefore pliable, and at the point all the weight rests in one place.\u003c\/p\u003e\u003cp\u003eThe copper discolours over the years, and that polishes back with lemon and salt (not too hard: salt is mildly abrasive and dissolves well in the lemon juice). Do it gently, along the edges. \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003eWhy is my copper turning green or black\u003c\/a\u003e explains what you do and do not need to do.\u003c\/p\u003e\u003cp\u003eThe tradition runs from Bovis through Drbal to Golod, and at Manipal University peer-reviewed animal studies found lower stress hormones under a pyramid model than in a cube of the same dimensions: the shape did the work, not the shelter. What you experience yourself comes on top of that.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Small (14.56 cm)","offer_id":54696183923029,"sku":"8720726791595","price":39.95,"currency_code":"EUR","in_stock":false},{"title":"Large (23.56 cm)","offer_id":54696183955797,"sku":"8720726791601","price":49.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-piramide-glad-klein-1.jpg?v=1791102153"},{"product_id":"kopero-premium-koperen-waterfles","title":"Kopero Copper Water Bottle","description":"\u003cp\u003eThis bottle is made for one habit: fill it with still water in the evening, let it stand overnight, and drink it first thing the next morning. In Ayurveda that is called tamra jal, copper water, and there it is not an afterthought but the fixed opening of the day. Where the tradition comes from, and what can reasonably be said about it, is set out in \u003ca href=\"\/blogs\/knowledge-base\/tamra-jal-the-ayurvedic-tradition-of-drinking-water-from-copper\"\u003ethe article on tamra jal\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eNine hundred millilitres is a deliberate size: enough for a full morning portion with a second glass after it, and still a bottle that fits in a bag. It stands upright on a desk, fits beside a bed, and opens with one hand.\u003c\/p\u003e\n\u003cp\u003eYou choose between \u003ca href=\"\/blogs\/knowledge-base\/smooth-or-hammered-copper\"\u003esmooth and hammered\u003c\/a\u003e. Smooth gives an even surface that reflects the light in a single plane. Hammered is worked by hand, so every piece has its own pattern of dents that breaks the light. The copper underneath is the same either way. Both are formed from a single piece of copper, with no seam and no solder, so your water touches nothing but copper.\u003c\/p\u003e\n\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\n\u003cp\u003eStill water goes in, and nothing else. Carbonated water, lemon juice, sports drinks and vinegar are acidic enough to dissolve copper faster; pour those into a glass. How much you can sensibly drink from it per day, and why there is an upper limit, is covered in \u003ca href=\"\/blogs\/knowledge-base\/how-many-times-a-day-should-you-drink-from-a-copper-bottle\"\u003ehow often per day you should drink from a copper bottle\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe bottle is not dishwasher safe. Rinsing with warm water is usually enough, and a slice of lemon with salt (not too hard: salt is mildly abrasive and dissolves well in the lemon juice) brings the shine back now and then. The full routine is in \u003ca href=\"\/blogs\/knowledge-base\/maintaining-a-copper-bottle-cleaning-polishing-and-storage\"\u003ethe care article\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eAnd it will darken. Uncoated copper reacts to air and moisture and grows darker over the weeks, sometimes with green or black patches. That is normal, it is reversible, and it is also the clearest proof that there is no lacquer over it. When discolouration does mean something, read \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003ewhy is my copper turning green or black\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eStill weighing up copper, stainless steel and plastic? \u003ca href=\"\/blogs\/knowledge-base\/copper-vs-plastic-vs-stainless-steel-a-fair-material-comparison\"\u003eThe material comparison\u003c\/a\u003e puts the three side by side. Copper is the only one of the three that is naturally antibacterial, and the only one you polish back instead of replacing.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Smooth","offer_id":54697656189269,"sku":"8720726791397","price":59.95,"currency_code":"EUR","in_stock":true},{"title":"Hammered","offer_id":54697656222037,"sku":"8720726791380","price":59.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-waterfles-glad-1.jpg?v=1791102152"},{"product_id":"kopero-premium-koperen-armband","title":"Kopero Copper Bracelet","description":"\u003cp\u003eWearing a copper bracelet is not a new idea. The practice runs from Egyptian and Greek sources through Ayurveda to the modern Western market, and it was also studied seriously a few times in the twentieth century. What those studies did and did not show is set out in \u003ca href=\"\/blogs\/knowledge-base\/the-copper-bracelet-a-centuries-old-tradition\"\u003ethe copper bracelet, a centuries-old tradition\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThere are \u003ca href=\"\/blogs\/knowledge-base\/smooth-or-hammered-copper\"\u003efour finishes\u003c\/a\u003e. \u003cstrong\u003eTwisted\u003c\/strong\u003e has a classic cable structure of strands wound into each other. \u003cstrong\u003eSmooth\u003c\/strong\u003e is a single, even band with no relief. \u003cstrong\u003eHammered\u003c\/strong\u003e is worked by hand and catches the light in small facets. \u003cstrong\u003eRound\u003c\/strong\u003e is a plain round bar with no texture. The copper is the same in all four; the choice is about how visibly you want to wear it.\u003c\/p\u003e\n\u003cp\u003eThe bracelet is open and adjustable, with a circumference of about 17.5 centimetres. You bend it slightly wider or narrower with two hands so it stays on the wrist without pinching. Do that gently and no more often than you need to: copper is malleable, but bending it back and forth repeatedly weakens the metal.\u003c\/p\u003e\n\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\n\u003cp\u003eTake the bracelet off when you shower, swim and exercise. Soap, chlorine and sweat make the copper darken faster; keep it dry and the shine holds far longer.\u003c\/p\u003e\n\u003cp\u003eOn many wearers, copper leaves a faint green tint on the skin. That is a reaction between copper, sweat and skin oils, and it washes off with water. What it does and does not mean is explained in \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003ewhy is my copper turning green or black\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eMore has been measured about copper on the skin than most people realise: the oldest clinical bracelet study measured an average release of 13 milligrams of copper per month, the dermatologists Hostynek and Maibach showed that metallic copper passes through the outermost layer of skin, and in wound care copper dressings sped up healing. What may officially be said about copper in the EU, and what that rests on, is set out in \u003ca href=\"\/blogs\/knowledge-base\/copper-and-your-body-what-can-you-actually-say-the-8-official-eu-claims\"\u003ethe eight official EU claims\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eYour body makes a copper compound of its own too: GHK-Cu, a tripeptide that holds on to copper. At twenty there are around 200 nanograms per millilitre of it in your plasma, at sixty still 80, and research describes it as stimulating collagen and elastin. Wound dressings with copper oxide have meanwhile been cleared by the American FDA and have been in medical use for over six years. What all of that does and does not say about a bracelet is in \u003ca href=\"\/blogs\/knowledge-base\/copper-on-your-skin\"\u003ecopper on your skin\u003c\/a\u003e.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Twisted","offer_id":54697656320341,"sku":"8720726791427","price":29.95,"currency_code":"EUR","in_stock":true},{"title":"Smooth","offer_id":54697656353109,"sku":"8720726791434","price":29.95,"currency_code":"EUR","in_stock":true},{"title":"Hammered","offer_id":54697656385877,"sku":"8720726791571","price":29.95,"currency_code":"EUR","in_stock":true},{"title":"Round","offer_id":54697656418645,"sku":"8720726791564","price":29.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-armband-gedraaid-1.jpg?v=1791102152"},{"product_id":"kopero-premium-koperen-mok","title":"Kopero Copper Mug","description":"\u003cp\u003eThe mug is the only piece of Kopero drinkware with a handle, and that changes what you use it for. Copper conducts heat quickly, so a hot tea or coffee warms the wall within seconds. With the handle you still pick it up as normal.\u003c\/p\u003e\n\u003cp\u003eThat same conductivity works the other way round just as well: cold water in a copper mug feels cold in your hand almost at once.\u003c\/p\u003e\n\u003cp\u003eFour hundred millilitres is a generous cup of coffee or tea, or a portion of water that can rest overnight in the tamra jal tradition. More on that in \u003ca href=\"\/blogs\/knowledge-base\/tamra-jal-the-ayurvedic-tradition-of-drinking-water-from-copper\"\u003ethe article on tamra jal\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThere is felt on the base. That saves scratches on a wooden table and it saves noise when you set the mug down. Beyond that you choose between \u003ca href=\"\/blogs\/knowledge-base\/smooth-or-hammered-copper\"\u003esmooth and hammered\u003c\/a\u003e: an even surface, or a hand-worked pattern that breaks the light. The mug itself is formed from a single piece of copper, with no seam. The handle is brazed on separately, on the outside. Nothing of that joint reaches the inside, so your drink only touches the copper mug itself.\u003c\/p\u003e\n\u003cp\u003eThere is another reason copper became the tradition. In EPA tests, cleaned copper killed more than 99.9% of bacteria such as MRSA and E. coli within two hours, and since 2008 it has been registered in the United States as an antimicrobial material. It is also a trace element your own body uses, from energy metabolism to the transport of iron in your blood. Stainless steel and plastic are inert and do neither. The evidence is in \u003ca href=\"\/blogs\/knowledge-base\/can-copper-really-kill-bacteria-the-evidence-from-epa-to-southampton\"\u003ecan copper really kill bacteria\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/knowledge-base\/coffee-and-tea-from-a-copper-mug\"\u003eCoffee and tea are for drinking fresh\u003c\/a\u003e: pour, drink and rinse the mug afterwards. Lemon tea, sharply acidic fruit tea and soft drinks are at their best in glass.\u003c\/p\u003e\n\u003cp\u003eWash the mug by hand and keep the felt base as dry as you can; the dishwasher is bad news for both. The rest of the care routine is in \u003ca href=\"\/blogs\/knowledge-base\/maintaining-a-copper-bottle-cleaning-polishing-and-storage\"\u003ethe care article\u003c\/a\u003e, and the natural darkening is covered in \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003ewhy is my copper turning green or black\u003c\/a\u003e.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Smooth","offer_id":54697656451413,"sku":"8720726791458","price":34.95,"currency_code":"EUR","in_stock":true},{"title":"Hammered","offer_id":54697656484181,"sku":"8720726791588","price":34.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-mok-glad-1.jpg?v=1791102152"},{"product_id":"kopero-premium-koperen-beker","title":"Kopero Copper Cup","description":"\u003cp\u003eThe cup is the original form of tamra jal. Before there were bottles with screw caps, a copper cup of water simply stood beside the bed in the evening and was drunk in the morning. Three hundred millilitres is exactly what you finish in a swallow or two.\u003c\/p\u003e\n\u003cp\u003eThat also makes this the simplest way to try the ritual. Fill, leave, drink, rinse and let it dry upside down. Where the habit comes from is set out in \u003ca href=\"\/blogs\/knowledge-base\/tamra-jal-the-ayurvedic-tradition-of-drinking-water-from-copper\"\u003ethe article on tamra jal\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe cup comes \u003ca href=\"\/blogs\/knowledge-base\/smooth-or-hammered-copper\"\u003esmooth and hammered\u003c\/a\u003e. Smooth keeps the surface even and quiet; hammered is worked by hand and carries its own pattern that breaks the light. The copper underneath is the same either way. The cup is formed from a single piece of copper, with no seam and no solder.\u003c\/p\u003e\n\u003cp\u003eThere is another reason copper became the tradition. In EPA tests, cleaned copper killed more than 99.9% of bacteria such as MRSA and E. coli within two hours, and since 2008 it has been registered in the United States as an antimicrobial material. It is also a trace element your own body uses, from energy metabolism to the transport of iron in your blood. Stainless steel and plastic are inert and do neither. The evidence is in \u003ca href=\"\/blogs\/knowledge-base\/can-copper-really-kill-bacteria-the-evidence-from-epa-to-southampton\"\u003ecan copper really kill bacteria\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\n\u003cp\u003eFill the cup with still water. Carbonated water, lemon water and other acidic drinks dissolve copper faster and belong in glass. Do not leave water standing in it for more than a day either; the ritual is one night, not one week. On how much per day, see \u003ca href=\"\/blogs\/knowledge-base\/how-many-times-a-day-should-you-drink-from-a-copper-bottle\"\u003ethis article\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHand wash, no dishwasher. Warm water and a soft cloth are enough; lemon and salt (not too hard: salt is mildly abrasive and dissolves well in the lemon juice) polish the shine back. The full routine is in \u003ca href=\"\/blogs\/knowledge-base\/maintaining-a-copper-bottle-cleaning-polishing-and-storage\"\u003ethe care article\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eDiscolouration is part of it. Pure copper without a coating grows darker the more you use it, and it can always be polished back. \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003eWhy is my copper turning green or black\u003c\/a\u003e explains what you do and do not need to do.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Smooth","offer_id":54697656516949,"sku":"8720726791496","price":29.95,"currency_code":"EUR","in_stock":true},{"title":"Hammered","offer_id":54697656549717,"sku":"8720726791502","price":29.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-beker-glad-1.jpg?v=1791102152"},{"product_id":"kopero-premium-koperen-kan","title":"Kopero Copper Jug","description":"\u003cp\u003eThe jug is the household size: 1.4 litres, enough to pour four to five glasses. You fill it in the evening, let it stand, and pour for everyone at once the next morning. Where that practice comes from is set out in \u003ca href=\"\/blogs\/knowledge-base\/tamra-jal-the-ayurvedic-tradition-of-drinking-water-from-copper\"\u003ethe article on tamra jal\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eIt has a matching copper lid, and that is not decoration: water left on the counter overnight is water left open overnight. The lid keeps dust and insects out. The spout is narrow enough to pour without spilling, and the handle stays cool enough to hold.\u003c\/p\u003e\n\u003cp\u003eThe jug comes \u003ca href=\"\/blogs\/knowledge-base\/smooth-or-hammered-copper\"\u003esmooth and hammered\u003c\/a\u003e. At this size the difference is easy to see: the smooth surface gives one continuous reflection, while the hammered piece spreads the light across dozens of small facets. The jug, spout included, is formed from a single piece of copper, with no seam. The handle is brazed on separately, on the outside. Nothing of that joint reaches the inside, so your water only touches the copper jug itself.\u003c\/p\u003e\n\u003cp\u003eThere is another reason copper became the tradition. In EPA tests, cleaned copper killed more than 99.9% of bacteria such as MRSA and E. coli within two hours, and since 2008 it has been registered in the United States as an antimicrobial material. It is also a trace element your own body uses, from energy metabolism to the transport of iron in your blood. Stainless steel and plastic are inert and do neither. The evidence is in \u003ca href=\"\/blogs\/knowledge-base\/can-copper-really-kill-bacteria-the-evidence-from-epa-to-southampton\"\u003ecan copper really kill bacteria\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\n\u003cp\u003eStill drinking water goes in the jug. Fruit juice, squash and carbonated water are too acidic for copper. Refresh the water daily rather than leaving it standing for days.\u003c\/p\u003e\n\u003cp\u003eWash jug and lid by hand and dry them straight away; standing moisture is where the first marks start. Because a jug has far more surface than a cup, you also see copper's natural darkening sooner here. That is not a fault: \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003ewhy is my copper turning green or black\u003c\/a\u003e explains how it works, and \u003ca href=\"\/blogs\/knowledge-base\/maintaining-a-copper-bottle-cleaning-polishing-and-storage\"\u003ethe care article\u003c\/a\u003e explains how to polish it back.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"Smooth","offer_id":54697656582485,"sku":"8720726791519","price":74.95,"currency_code":"EUR","in_stock":false},{"title":"Hammered","offer_id":54697656615253,"sku":"8720726791526","price":74.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-kan-glad-1.jpg?v=1791102153"},{"product_id":"kopero-elektrocultuur","title":"Kopero Electroculture","description":"\u003cp\u003eFour copper antennas with a coil on top, which you push upright into the soil beside the plants you have in mind. Nothing else is involved: no power, no batteries, no maintenance. Where the idea comes from and what has been studied about it is in \u003ca href=\"\/blogs\/knowledge-base\/electroculture-a-centuries-old-gardening-tradition-rediscovered\"\u003ethe article on electroculture\u003c\/a\u003e. The history in the Netherlands itself, from a garden attraction in Andijk to a Philips trial in the Beemster, is in \u003ca href=\"\/blogs\/knowledge-base\/electroculture-in-the-netherlands-from-andijk-to-today\"\u003eelectroculture in the Netherlands\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eYou choose between 30 and 60 centimetres. The short size suits pots, houseplants and low planting; the long one reaches further into a border or vegetable garden and still stands above taller crops. Four to a set, so you can spread them across a bed or a group of pots. How far apart and how deep is in \u003ca href=\"\/blogs\/knowledge-base\/placing-electroculture-antennas\"\u003eplacing the antennas\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eThe whole antenna is solid copper, the stake included. That is the difference with versions where only the coil is copper and the stake is wood: wood can rot in the ground, and there is less conductive surface in the soil. Which copper we use is in \u003ca href=\"\/blogs\/knowledge-base\/what-our-copper-products-are-made-of\"\u003ewhat our copper products are made of\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eThat it is copper in particular has the same reason an earth rod is copper: of all metals only silver conducts better, and copper keeps doing so in wet ground for years. The international unit of electrical conductivity is even defined on it. What sits behind that physically is in \u003ca href=\"\/blogs\/knowledge-base\/why-copper-conducts\"\u003ewhy copper conducts\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eThat comparison with the earth rod is not a metaphor. The European lightning protection standard EN-IEC 62305 lists copper as a conductor and as an earth electrode, and what an electrician calls earthing is literally a copper connection to the soil. More on that is in \u003ca href=\"\/blogs\/knowledge-base\/copper-shielding-and-earthing\"\u003ecopper as a shield\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eHow to get the most out of your copper\u003c\/h3\u003e\u003cp\u003ePush on the stake when you put the antenna into the ground, not on the coil. It bends easily and should stay round, clear of leaves and mesh. Keep your distance from the roots of the plant itself.\u003c\/p\u003e\u003cp\u003eOutdoors copper discolours faster than indoors: rain and soil do their work, and the antennas turn darker and eventually green. That is normal and says nothing about how they work. \u003ca href=\"\/blogs\/knowledge-base\/why-is-my-copper-turning-green-or-black-and-is-that-a-problem\"\u003eWhy is my copper turning green or black\u003c\/a\u003e explains when discolouration does mean something.\u003c\/p\u003e\u003cp\u003eMore has been measured than you would expect. Between 1918 and 1936 the British Ministry of Agriculture reported yield increases of 30 to 50%, in China a programme runs across more than 3,600 hectares of greenhouses with yields 20 to 30% higher, and in 2022 Nature Food published peas that germinated 26.3% faster. We promise no harvest, because that depends on your soil, your crop and your season. Every measurement is laid out in the article above. Measurements were also taken extensively in the Soviet Union, all the way to a greenhouse aboard a space station: \u003ca href=\"\/blogs\/knowledge-base\/electroculture-in-the-soviet-union-and-into-space\"\u003eelectroculture in the Soviet Union and into space\u003c\/a\u003e. And what insects have to do with electric fields, you can read in \u003ca href=\"\/blogs\/knowledge-base\/can-insects-sense-electricity\"\u003ecan insects sense electricity\u003c\/a\u003e.\u003c\/p\u003e","brand":"Kopero","offers":[{"title":"30 cm","offer_id":54697656648021,"sku":"8720726791540","price":39.95,"currency_code":"EUR","in_stock":true},{"title":"60 cm","offer_id":54697656680789,"sku":"8720726791557","price":59.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/7259\/4005\/files\/kopero-elektrocultuur-30-cm-1.jpg?v=1791102152"}],"url":"https:\/\/kopero.eu\/collections\/massief-koper.oembed","provider":"Kopero","version":"1.0","type":"link"}