This meticulously designed double walled aerating tumbler gives you the best of both worlds: a smooth, sleek silhouette with a classic feel and an internal tulip shape that disperses ethanol and concentrates and diffuses aromatics for a better bourbon sipping experience. Quantity: 1 glass materials: borosilicate glass 7 oz. Capacity details: double-walled design with aeration ridges care: dishwasher safe