Drinking water from copper glass will help your digestive system, kills bacteria in the intestines and reduces acidity and inflammation.
It is also said that it helps in losing weight and slowing down aging. Though until now no one has been successful in scientifically prove it.
Storing water in copper vessel will reduce the bacteria in it as copper is known to be effective against bacteria like E.coli and S.aureus.
In conclusion using copper utensils is far better than using other materials.