The Wine FREEZE™ is perfect for all wines. Just pop it in the fridge to cool your reds to the perfect cellar temperature or store in the freezer to chill your whites. HOST®'s proprietary cooling gel is precisely engineered to keep your beverage perfectly cold for hours. For red wine, refrigerate HOST® Wine FREEZE™ Cooling Cups for at least two hours to keep your drink between fifty-eight and sixty degrees Fahrenheit For white wine, freeze HOST® Wine FREEZE™ Cooling Cups for at least two hours to keep your drink between forty-three and fifty-three degrees Fahrenheit Inside the BPA free plastic walls of the HOST® Wine FREEZE™ Cooling Cups lies our proprietary cooling gel. This gel was precisely engineered in house to provide the perfect temperature for white and red wines for hours Each glass is constructed with an insulated silicone band for comfortable handling. Each glass can comfortably accommodate 8.5 ounces Hand wash only. For the best results, place the Wine FREEZE™ upside down in the freezer to allow the gel to evenly spread and freeze.