Copper Drinking Bottles Copper drinking bottles (tamba) have been made and used in India for over 500 years. According to Ayurveda, drinking water from a copper bottle helps balance the three energies circulating through the human body, the Doshas (Vata – air element, Kapha – water element, and Pitta – fire element). These bottles are only suitable for water. Not for milk, citrus, or acidic liquids. Through the copper, negative eons are transformed into positive eons. Cleaning and Maintenance Instructions Do not wash in the dishwasher Clean with natural soap, a soft sponge, and water at room temperature To make the copper shine, use lemon wedges or copper polish Do not expose to direct sunlight NB: Copper discolors over time due to oxidation. The material may also show some stains. These are both natural properties of copper and do not negatively affect drinking from a copper bottle like this one. The bottles may also have imperfections.