How to Identify an Original Copper Bottle: 7 Simple Checks
Look inside first: a real copper bottle is copper-coloured inside too, not silver. Then check that a magnet doesn’t stick, that it feels solid rather than tinny, and that a lemon-and-salt rub brings up bright copper instead of a grey layer. A seller of pure copper will state it plainly, with the capacity and where it was made.
The seven checks
- 1. Look inside. The inside should be the same reddish-orange copper (darker with age). A silver or grey inside means it is lined or plated: the water never touches copper.
- 2. Magnet test. Copper isn’t magnetic. If a fridge magnet sticks to the body, there is steel or iron in it.
- 3. Weight and feel. Solid copper feels dense and rigid. A very light bottle that dents easily may be thin coating over another metal.
- 4. Lemon and salt. Rub a small spot outside with lemon and salt. Real copper turns bright pink-orange. If a grey or silver layer shows through, it’s plated.
- 5. Colour change over time. Real copper darkens and can get green spots with moisture. That’s normal and cleans off.
- 6. Seams and lid. Check the joints and the cap. A well-made bottle has neat seams and a lid that seals; some caps are steel or brass, which is fine.
- 7. Seller details. Look for “pure copper”, capacity, where it was made, care instructions and a clear return policy.
Painted, Meenakari and hammered bottles
Many beautiful copper bottles are decorated on the outside: hammered, printed or finished in Meenakari enamel. That’s fine: what matters for copper water is the inside. Do the inside check and the magnet test; skip the lemon rub on painted areas so you don’t damage the finish.
Real copper vs common lookalikes
| Pure copper | Copper-coated steel | Brass bottle | |
|---|---|---|---|
| Inside colour | Copper | Silver / grey | Yellow-gold |
| Magnet | Doesn’t stick | Sticks | Doesn’t stick |
| Feel | Dense, rigid | Light or tinny | Heavy |
| Lemon rub | Bright copper | Grey shows through | Bright yellow |
| Water touches copper? | Yes | No | Copper-zinc alloy |
Lacquer inside? Some decorative bottles are lacquered inside to stop tarnish. Water then doesn’t touch copper. If the inside looks glossy and never changes colour, ask the seller.
Before you start using it
Wash a new bottle inside with lemon and salt, rinse well and fill it with room-temperature drinking water. Copper is for plain water only: no lemon water, juice or hot water stored in it. Clean the inside every week or two, and dry it with the cap off.
Copper from Moksae
Frequently asked questions
How can I check if my copper bottle is pure?
Look inside for copper colour, check that a magnet doesn’t stick, and do a small lemon-and-salt rub outside to see if bright copper shows. Buy from a seller who states “pure copper”.
Do original copper bottles turn black?
Yes, copper darkens with air and water, and can get green spots. It’s normal and cleans off with lemon and salt.
Is a copper bottle with a steel cap real?
It can be. Caps are often a different metal. What matters is that the body, especially the inside, is copper.
Why is my “copper” bottle silver inside?
It is lined, coated or plated. It may be a fine bottle, but water stored in it doesn’t touch copper.
Keep reading
Sources
- World Health Organization, Guidelines for drinking-water quality: copper (guideline value 2 mg/L)
- Sudha V.B.P. et al. (2012), "Storing drinking-water in copper pots kills contaminating diarrhoeagenic bacteria", Journal of Health, Population and Nutrition
- US FDA Food Code, §4-101.14 Copper, use limitation (copper and brass not for acidic food below pH 6)
