Copper Glasses set of 2 for drinking water to keep good health. The best remedy to overcome these problems is to store water in a copper utensil overnight and drink every morning. We request everybody to propagate this every morning, whosoever is suffering from any diseases care tips: (1) Clean your copper ware by hand and avoid dishwasher as the detergent can cause oxidation leading to permanent damage. (2) 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. (3) Avoid scratchy cleaners like steel wool. (4) Soft cleaning liquid on soap base, hot water and a soft washing cloth is best for daily use. (5) Use copper shining powder for cleaning the copper utensils. Completely safe and gentle on hands. (6) copper utensils tarnish from time to time. This is normal for an authentic copper utensils, many customers love the vintage/antique tarnished look, but care instructions for minimizing and removing tarnish to be followed.