Shaken or stirred, the Glass Martini FREEZE Cooling Cup keeps your drink at the optimal temperature. Our proprietary cooling gel freezes solid inside the double-walled chamber, providing thermal insulation that keeps your drink cold for longer. For a cold drink that lasts, freeze HOST Glass Martini FREEZE Cooling Cups for at least two hours to keep your drink between forty-three and fifty-three degrees Fahrenheit. Keep the HOST Martini FREEZE Cooling Cups in the freezer so they are ready to go when you are. Inside the glass walls of HOST Glass Martini FREEZE Cooling Cups lies our proprietary cooling gel. This gel was precisely engineered in house to keep any beverage the perfect temperature for hours. Each cup is constructed with an insulated silicone band for comfortable handling. The set includes two HOST Glass Martini FREEZE Cooling Cups. Each cup can comfortably accommodate 9 ounces. Hand wash only. For the best results, place the Glass Martini FREEZE upside down in the freezer for 2 hours to allow the gel to evenly spread and freeze.