We do not recommend using a dishwasher for any crystal glasses. The Waterford Crystal Ardan Tonn Beverage Goblets as Waterford calls them! are perfect for Water, Red Wine, Gin and Tonic or anything else that takes your fancy. In USA they would use them for Iced Tea. This striking modern design is inspired by the rivers and streams that flow from the mountains to the Atlantic Coast near to the home of Waterford Crystal. These Goblets should be used for all occasions and not just kept for best. it will make drinking even more pleasurable.