The Bodum double wall line comes in a variety of sizes. They are designed to insure that your beverage of choice stays at desired temperature for a longer period of time. Crafted from borosilicate glass, when drinking hot beverages the temperature on the outside of the glass remains constant allowing you to hold your beverage without a handle comfortably.
Please use with care when placing ice into the glass to avoid fracturing the inner layer, Bodum suggests placing liquid first then ice.
For best results retaining heat, pre heat the glass before use.