Great mug for my morning coffee, beautifully shiny copper.

Why copper works
Kills bacteria on contact
Changes the water it touches
A mineral your body needs
Long used for skin and recovery
The handle does the work
Copper gets as hot as whatever is in it. That is why this mug has a handle and the cup does not: you pick up hot coffee or tea by the grip.
Four hundred millilitres on your desk
A generous cup of coffee or tea, or a portion of water that can stand overnight. There is felt on the base, so it does not slide or make noise on wood.
What you actually get
The 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.
That same conductivity works the other way round just as well: cold water in a copper mug feels cold in your hand almost at once. It is a mug you notice.
Four 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 the article on tamra jal.
There 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 smooth and hammered: an even surface, or a hand-worked pattern that breaks the light.
What to watch out for
Black coffee and tea are fine. Lemon tea, sharply acidic fruit tea and soft drinks are better avoided: they attack copper. Do not store anything in it for more than a day either.
Wash 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 the care article, and the natural darkening is covered in why is my copper turning green or black.
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
400 ml with a solid copper handle
The curved handle stays comfortable to hold, even when the wall is warm from a hot drink.
Copper conducts heat quickly
That's why the wall of the mug soon picks up the temperature of your coffee or tea. So hold it by the handle.
Independently tested for food safety
Tested to European food safety standards; both the migration and odour/taste tests passed, none of the 19 heavy metals tested for were found. Read the full study under What does research say about copper?
Smooth or hammered
Only the surface differs. Smooth keeps the silhouette calm, hammered gives the surface more depth through a handmade pattern.
A colour change that comes with pure copper
Solid copper changes colour a little on its own as you use the mug. That's completely normal, and even a sign of pure, uncoated copper. If you prefer the shine, simply polish the mug 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"
The copper mug up close
A familiar mug shape in tested copper, delivered with protection for both mug and table.
The material composition was tested by RTC Laboratory: 99.21% copper and 0.75% zinc, the same ratio as the rest of the Kopero drinkware. This zinc comes from the casting process and isn't an added extra.
The curved handle makes the mug comfortable to hold during your daily moment.
Choose the calm shine of smooth copper or the handcrafted character of a hammered surface.
The felt base protects the mug and the surface underneath.
The mug comes in a velvet pouch, together with a felt base and a sturdy branded box.
URS Products and Testing tested the mug to European food safety standards; both the migration and odour/taste tests passed, none of the 19 heavy metals tested for were detected.
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 daily coffee or tea moment.
-
1
Clean the mug first
Before first use, rub the inside and outside with lemon and salt, rinse thoroughly and dry it right away.
-
2
Fill it with water, tea or coffee
The mug suits hot drinks. Avoid very acidic drinks and don't leave anything in it longer than a day.
-
3
Hold it by the handle
Copper conducts heat quickly, so the wall gets warm with a hot drink. Hold the mug by the handle and set it on a coaster.
-
4
Or let water sit overnight
If you want to use the mug for the Tamra Jal ritual, fill it in the evening with still water and drink it the next morning.
-
5
Wash it by hand
Warm water and a soft cloth. Keep the felt base as dry as possible and dry the mug right after.
-
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
Gorgeous pattern, a real showpiece on the table.
Black coffee from copper is a distinct experience. The flavour lands fuller and I automatically drink more slowly. Really lovely.
For water I think it's brilliant. After a few hours it tastes softer and still feels surprisingly cool.
I use it during my morning meditation. Warm water in it, hands around the handle, and I arrive faster. A powerful feeling.
Tea without lemon tastes rounder from this mug. Not hugely different, but enough to leave my usual mug in the cupboard.
My afternoon dip is smaller since I fill the mug with water instead of a third coffee. The 400 ml really helps with that.
The 400 ml capacity is wonderfully generous for tea or a large glass of water.
Wow, cold water turns lovely and crisp almost immediately in this mug. On warm days it lives on my desk.
I thought the coffee would pick up a metallic taste, but I taste more bitterness and less flatness instead. I like that.
According to Ayurveda warm water suits my morning better. In the copper mug the ritual feels even more right and my stomach stays calmer.
Since drinking from this I take more deliberate sips. Sounds like a small thing, but I drink less hurriedly and feel better afterwards.
The felt base sits softly and silently on my wooden desk.
400 ml of copper water in the morning and I'm awake. No fireworks, but a clearer feeling that lasts longer.
My tea doesn't stay warm any longer than usual, but it does taste softer to me. That's exactly what I was curious about. I then tested the same tea in a ceramic mug. There it tasted flatter and I let it go cold without thinking. From copper I actually make a moment of it.
The large handle sits comfortably in the hand and makes unhurried drinking come naturally.
The simple shape sits nicely among the rest of my crockery.
Wow, my morning tea suddenly tastes much fuller. I use no lemon or milk, so the flavour really comes through.
Cold water from this mug is so refreshingly crisp. The outside turns cool straight away, and that changes the whole drinking moment.
I'd read about copper in the Ayurvedic tradition. With warm water in this mug I start calmly and my stomach feels less rushed.
Black coffee is still coffee, of course, but I taste it more intensely and less watery. A surprisingly big difference.
The 400 ml means I drink more water at work. It tastes softer and I don't have to refill every half hour.
The texture gives plenty of grip and makes the mug genuinely striking to look at.
My partner got curious about water from a copper mug. Now he keeps taking it because he thinks it tastes fresher.
After a week I noticed I was having my morning coffee later. Warm copper water first simply feels better in my body.
Powerful mug, literally and figuratively. It looks sturdy, and my tea gives me a warm, calm feeling that lingers.
No acidic drinks in it, I stick to that properly. With plain tea and water I taste a soft, clean flavour.
The roomy handle and the felt base are nice details for everyday use.
I drink more slowly from copper and notice that it quietens my head a little too. I hadn't expected that effect.
Ayurveda was the reason, but everyday use convinced me. Lukewarm water in particular tastes far nicer from this. At first I only used it at weekends. Now it sits by the kettle every morning. My ordinary mugs barely get touched.
Every fall of light looks different on the hammered copper.
A striking mug that colleagues ask about unprompted.
Write a review
Frequently asked questions about this product
Can I drink coffee or tea from the mug?
Yes, that's exactly what the mug is for. Just keep in mind that copper conducts heat quickly: the wall gets hot with a hot drink. Hold the mug by its copper handle and set it on a coaster instead of placing it loose on the table.
Can I also use the mug for the Tamra Jal ritual?
Absolutely. Fill the mug with still drinking water in the evening and drink it the next morning. Avoid acidic drinks like lemon water or kombucha for longer storage, and don't leave anything in it for more than 24 hours.
What's the difference between the smooth and the hammered mug?
Material, a 400 ml capacity and the solid copper handle are the same for both. The smooth mug keeps the silhouette calm and even, while the hammered mug gets extra depth from the handmade pattern of small facets on the surface, while the handle stays smooth and comfortable to hold.
Can the mug go in the dishwasher?
No. Rinse the mug by hand with warm water, keep the felt base as dry as possible, and dry the mug straight away. Detergent and the heat of a dishwasher leave dull patches on solid copper.
The mug is getting darker, what should I do?
No problem: that's completely normal, and even a sign of pure, uncoated copper. If you want the shine back, simply polish the mug 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
Read next

Coffee and tea from a copper mug: what to watch out for
What can and cannot go in a copper mug, why the outside gets hot, and which teas you are better off avoiding.
Read on →
Smooth or hammered copper: what is the difference?
On almost every Kopero product you choose between smooth and hand-hammered. What changes, what does not, and where is...
Read on →
Tamra jal in practice: how much, how long and in which vessel
The ritual translated into an ordinary week: how long the water sits, which vessel suits what, and what you do when y...
Read on →


