Copper bowls inner steel, outer copper, dia 3.25", height 1.5", weight 240 grams, handmade by the artisans of mathura in India, shipped in 24 hours from India, the ageless use of copper ware testimony to its myriad virtues and everlasting appeal. Its therapeutic value has been handed down to us through the ages. In fact, water stored in copper ware is virtually the elixir of life. Purified, it helps to regulate digestion and cardiac orders, the basis of good health, as practiced by ayurveda and rishits from old vedic times. It has been known for thousands of years that copper metal can inhibit the growth of bacteria, viruses and fungi. Our scriptures recommend drinking of four glasses of water stored overnight in a copper utensil every morning, care tips: clean your copper ware by hand and avoid dishwasher as the detergent can cause oxidation leading to permanent damage. Use a solution of equal quantities vinegar or lemon juice and salt diluted with some water at such times but don't use it regularly. Also avoid scratchy cleaners like steel wool. A simple, soft cleaning liquid on soap base, hot water and a soft washing cloth is best for daily use.