A fantastic and unique way to serve whiskey, the Rolling Whiskey Tumbler tilts from side to side, but always returns to an upright position. This rocking glass has a fully rounded base made of solid glass. Thanks to the heavy glass, the center of gravity is very low, allowing the cup to roll from side to side and always return to its starting position. This fun way to serve whiskey also offers a functional element; the rocking motion will give your whiskey some pep. If you enjoy all aspects of whisky consumption, then swirling your mind will open the body, releasing new aromas for you to enjoy. Product Features: Round base tumbler Heavy base that always returns the glass to an upright position Unique way to swirl whiskies and spirits Full roundness gives a comfortable grip in the palm of the hand Machine made Dishwasher safe – see our glassware care guide for more information.