Whether you like your martini shaken or stirred, the Martini Glass FREEZE™ cooling glass keeps drinks at the optimal temperature. The active cooling gel inside the double-walled glass provides thermal insulation keeping drinks chilled at all times. Each glass is constructed with an insulated silicone band for comfortable handling. Quantity: 2 glasses Capacity: 9 oz. Materials: glass, silicone Design: insulated walls with active cooling gel Care: hand wash Directions: for the best results, place the martini freeze upside down in the freezer for 2 hours to allow the gel to evenly spread and freeze.