FROZEN COCKTAILS - For frozen concoctions, freeze Host FREEZE Whisky Cups for at least two hours to keep your drink between forty-three and fifty-three degrees Fahrenheit;CHILLED WHISKEY - Whether you`re in the mood for on the rocks, an old fashioned, or something sour, keep Host FREEZE Whisky Cups in the freezer so they are ready to go when you are;PROPRIETARY COOLING GEL - Inside the BPA Free Acrylic walls of Host FREEZE Whisky Cups lies our proprietary cooling gel. This gel was precisely engineered in house to keep any beverage the perfect temperature for hours;ADDITIONAL FEATURES - Each cup is constructed with an insulated silicone band for comfortable handling. Cups are dishwasher safe but we highly recommend placing them on the TOP RACK;SET OF TWO GLASSES - The set includes two Host FREEZE Whisky Cups. Each cup can comfortably accommodate 9 ounces