Lovely cup, exactly the size I was looking for.

Why copper works
Kills bacteria on contact
Changes the water it touches
A mineral your body needs
Long used for skin and recovery
Three hundred millilitres, no more
No cap, no handle, no thread: a straight copper cup you finish in one go. The hammering sets a handmade relief against that.
Small enough for a bedside table
Seven centimetres wide, nine and a half tall. On the hammered version an early patina stands out less, because the light already jumps across the dents.
What you actually get
The 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.
That also makes this the simplest way to try the ritual. No cap, no thread, no corners where water sits: fill, leave, drink, rinse and let it dry upside down. Where the habit comes from is set out in the article on tamra jal.
The cup comes smooth and hammered. 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.
What to watch out for
Fill 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 this article.
Hand wash, no dishwasher. Warm water and a soft cloth are enough; lemon and salt polish the shine back. The full routine is in the care article.
Discolouration is part of it. Pure copper without a coating grows darker the more you use it, and it can always be polished back. Why is my copper turning green or black explains what you do and do not need to do.
How it arrives
You unpack a sturdy branded box with a Kopero card inside: the QR code on it takes you to the digital manual. A velvet pouch comes with it too, to keep things protected on the move or in the cupboard.
What makes this special
The most original shape
Of the whole collection, this open cup stays closest to the classic Ayurvedic shape: compact, easy to hold and free of frills.
300 ml of solid copper
No coating, no inner lining. You use and clean the material exactly as it is.
Independently tested for food safety
Tested to European food safety standards; both the migration and odour/taste tests passed. Read the full study under What does research say about copper?
Smooth or hammered
Only the surface differs. Smooth gives a calm, mirror-like surface; hammered is hand-worked into a lively pattern.
A colour change that comes with pure copper
Solid copper changes colour a little on its own as you use the cup. That's completely normal, and even a sign of pure, uncoated copper. If you prefer the shine, simply polish the cup with lemon and salt. Exactly how is in the care guide.
99.21% copper, measured independently
The material is analysed by RTC Laboratory in Moradabad, a NABL-accredited lab, tested to ASTM-1621 and IS-228. The measurement came out at 99.21% copper and 0.75% zinc. That zinc is not an additive but a residue of the casting process: it makes the copper marginally stronger and changes nothing else. Food safety is covered by a second report, from URS Products and Testing, tested against EC 1935/2004, EU 10/2011 and REACH.
- 99,21% copper
- 0,75% zinc
- 0,04% remainder
- RTC Laboratory Moradabad
- composition, NABL-accredited
- URS Products and Testing
- food safety, EU regulation
- 19 heavy metals
- every one measured as "Not Detected"
Simple in shape, strong in material
See why this copper cup works just as well in your morning ritual as it does on a set table.
RTC Laboratory measured 99.21% copper and 0.75% zinc under ASTM-1621 and IS-228. This zinc comes from the casting process and isn't an added extra.
Smooth feels calm and minimal; hammered catches the light in a lively pattern.
The cup was tested to the relevant European food safety standards; the migration and odour/taste tests both passed.
Your cup arrives in an elegant velvet pouch and a sturdy Kopero box.
Now you know what is in it
- 30-day right of return
- Order before 11:30 pm on a weekday, delivered in 2-3 working days
- Delivery across Europe
Settled in, in six steps
From the first clean to your steady water ritual. Rinse, fill, leave it overnight: there is not much more to it.
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1
Clean the cup first
Before first use, rub the inside and outside with lemon and salt, rinse thoroughly and dry it right away.
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2
Fill it with still drinking water
Fill the cup to the rim. There's no set amount.
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3
Set it out in the evening
Let the water sit overnight and drink it the next morning. Cover the cup with a small plate if you leave it standing.
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4
It's for other drinks too
The cup isn't just meant for water, even though that's the most common use. Avoid very acidic drinks like pure citrus juice.
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5
Wash it by hand
Warm water and a soft cloth, then dry it right away.
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6
Polish it when the shine fades
Every one to two weeks with lemon and salt. Rinse thoroughly and dry right away.
The packaging also carries a QR code that takes you straight to this guide.
Reviews of this product
The hammered effect makes it truly unique.
First sip and I immediately thought: hey, this water tastes different. Softer and less like the tap. Wow.
I leave the water in the cup overnight. By morning the sharp chlorine taste is gone and I drink it down without effort.
I bought this because of Ayurveda and tamra jal. I enjoy the morning ritual, but it was mainly the rounder taste that surprised me.
My husband picked out the copper cup in a blind test. He called the water 'calmer'. That's exactly it.
Normally I have to remind myself to drink water. From this cup it tastes fresher and I reach for another one without thinking.
The smooth rim is pleasant to drink from, and 300 ml is a good amount for my morning.
The taste surprised me straight away. The water turns soft and almost slightly sweet, exactly as I'd hoped.
It took a week before I understood what had changed: the water feels less hard in my mouth. Sounds odd, but I can't describe it any other way.
Powerful start to the day. A full cup, a quiet moment sitting down, and I wake up faster than when I go straight for coffee.
My stomach feels calmer since I drink this water first thing in the morning. That's my own experience, of course, not a medical claim.
Rinsing it out and leaving it upside down to dry is quick and easy.
In Ayurveda I read that water is kept in copper for several hours. I now do that every evening and find the taste genuinely much nicer.
Even lukewarm water tastes good from this cup. Less flat, fresher. I'm genuinely happy with it. The first morning I thought I was imagining it. A few days later I tasted the same difference again. My ordinary glass has been at the back of the cupboard ever since.
The soft patina actually gives the cup more character over time.
It stands steady, feels solid and fits well in my kitchen cupboard.
Wow, water really does taste fresher from this. My ordinary glass next to it suddenly tasted dull.
I put it filled on my bedside table and drink it when I get up. The water feels soft in my mouth and my morning starts less rushed.
Coming from my Ayurvedic routine I wanted an uncoated copper cup. After storing overnight I taste a clear difference, especially with our hard tap water.
My daughter said out of the blue that the water was 'nicer'. She didn't even know I'd used a different cup.
I'd expected copper to taste metallic. It doesn't. The water is rounder and the tap aftertaste is practically gone.
The relief gives a good grip and looks beautiful in the morning light.
Since getting this cup I drink 300 ml of water before my coffee. It leaves me clearer-headed and less parched in the morning.
Hard to explain until you taste it. Water doesn't turn sweet, but it does turn softer. A really nice discovery.
After two weeks my mornings started to feel noticeably light and calm. The daily ritual is definitely staying.
The hammered surface sits firmly in the hand. Oddly enough the water also seems to stay cool longer, though I haven't measured it.
The cup feels solid and the rim is beautifully smooth all the way round.
I only use it for still water and that tastes noticeably cleaner. My partner now has his own cup, otherwise mine keeps disappearing.
Ayurveda gave me the idea; the taste convinced me. Wow, I never thought such a simple swap could make this much difference. I've used it for three weeks now and don't skip a morning. It's only a small moment, yet it makes my start calmer. The cup is ready by the tap the night before.
Together with the copper jug it makes a lovely set on the table.
The natural darkening makes every hammered facet stand out even more.
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Frequently asked questions about this product
What's the best way to use the cup?
Of the whole collection, the cup stays closest to the original Ayurvedic shape: open, easy to hold and easy to clean. The most common ritual is to fill it with still water in the evening, cover it with a small plate, and drink it empty the next morning, but the cup works just as well for everyday use at the table.
Can I use the cup for drinks other than water?
You can, although water is the most common and best-researched use. Avoid very acidic drinks like pure citrus juice or vinegar-based drinks, as these attack the copper faster than neutral water. Don't leave any drink in the cup for longer than a day.
What's the difference between the smooth and the hammered finish?
Just the finish: material, a 300 ml capacity and quality are the same. The smooth cup has a calm, mirror-like surface, while the hammered cup is hand-worked into small facets that play with the light and give the cup a bolder, more handcrafted look.
Can the cup go in the dishwasher?
No, rinse it by hand with warm water and a soft cloth and dry it thoroughly right away. The heat and harsh detergents of a dishwasher leave dull, uneven patches on solid copper.
The cup is discolouring, what should I do?
No problem: that's completely normal, and even a sign of pure, uncoated copper. If you want the original shine back, simply polish the cup with lemon and salt. Step by step instructions are in the care guide.
Not what you were after? No problem.
You have a 30-day right of return. Copper does take some getting used to: it tarnishes, it feels heavier in the hand than stainless steel, and now and then you will want to polish it. Give it a few weeks. If it is still not what you were after, send it back and get your money back.
Read the return policy
Try it without risk
- 30-day right of return
- Order before 11:30 pm on a weekday, delivered in 2-3 working days
- Delivery across Europe
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