1 X handmade pure Copper glass cup for water india by Karmakara Beneficial for health as mentioned in the Ayurveda The glass is made from 100% pure Copper. Copper is known to be far more poisonous to bacteria than others, e.g. stainless steel or aluminum. Storing water only for about three hours in a copper tumbler can kill harmful bacteria. Dimensions : 4.25 inch high and 3.0 inch in diameter at the lip. Made of pure copper, holds 250 Ml water