The Tamba™ has been clinically tested for quality and purity, and the copper is designed for Ayurvedic health practices. Tamba™ is made of the highest grade of copper, with over 96% purity and the remainder, zinc. The zinc helps to balance out the copper and enhance its healthful effects. Other copper vessels available on the market may not meet the purity standards of Tamba™ , and are primarily used for decoration, ceremonial purposes or alcoholic beverages (ie: Moscow Mule). Be cautious of products that claim 100% pure copper, as such products are rare and prohibitively expensive.