Copper discolors over time as a result of oxidation. The material can also show 'stains'. These are both natural properties of copper and have no negative effect on drinking from a copper bottle or cup. This will mainly take place on the inside. The bracelets are made of pure copper (99.6%). The bracelets can have irregularities, which is part of the natural properties of copper.
At the discoloration you can think a dark dots/smudges on the inside. In addition, it can become green(ish).
Maintenance instructions:
Do not wash in the dishwasher. Clean with natural soap, soft sponge and room temperature water. To make the copper shine, use lemon wedges or copper polish. Do not expose to direct sunlight.
How do you clean Copper?
- Take 1 cup of white vinegar, the sap of 1 - 2 lime, and 1 tablespoon salt. - Pour the mixture into a bowl - Leave for 30-45 minutes - Rub a sponge over the darkened spots - Rinse off the cup or bottle with lukewarm water
