With the Rabbit Whiskey Glass the ice is outside your beverage not in it. The Whiskey Glass will cool your drink down to just above freezing and keep it cool for up to two hours. The silicone base acts as a built-in coaster to prevent condensation from escaping. The silicone sleeve also protects your hands from the chill. Dimensions: 4- 2/5" H X 3- 7/8" Dia Capacity: 8 oz.