MATERIAL & CONTENT Copper bottle COPPER CARE 100% copper utensils stain and darken over a period of time. This happens naturally, due to a process called oxidation. If your copper utensils is getting darken, don’t worry. It’s an assurance that you have purchased 100% copper product. Clean as per suggestive process and it would be as new as ever. Clean it regularly and keep it dry. COPPER CLEANING METHODS: Use a vinegar-salt solution or rub it with lemon sprinkled with salt. Rinse and dry jug and glasses. Use some lemon juice and hot water in bottle and shake it well allow it to stand for a few minutes and then wash off with plain water. Note - don’t use metal scrubber as copper is a soft material, it can cause scratches on its surfaces.