TeraShopee Handmade Copper Tumbler, Set of 12 Set of 12, tumblers for drinking water Outside copper, inner stainless steel Dia 3", Depth 4.2",capacity 11.8 oz, Weight 290 grams per pc 100% Satisfaction Guarantee by TeraShopee product as we are only the authorized dealer. We will not be responsible for the fake product which has been sold by fake sellers. COPPER CARE INSTRUCTIONS : After each use, clean with warm water and soft soap. No hard chemicals or detergents. Dry the copper shot glass with a soft cloth.- Do not leave liquid in the shot glass overnight to avoid stains - Not dishwasher safe - Do not use in microwave - Do not use with hot beverages