The Double Rocks Glass is part of the revolutionary collection from RIEDEL Bar, named Drink Specific Glassware. This glass is perfect for cocktails and spirits served with large-format ice cubes. Its larger design accommodates drinks with a higher proportion of non-alcoholic mixers than drinks served in the original Rocks glass. This product is made of clear crystal glass. Presenting the RIEDEL Bar Drink Specific Glassware collection, an innovative series in collaboration with spirits specialist Zane Harris. This collection answers the need for cocktail-specific glassware with glasses like Neat, Rocks, Double Rocks, Fizz, Highball, Nick %26 Nora, Sour and Coffee, all perfected to cater to thousands of cocktails. This product is machine-made. This item is dishwasher safe.