1.[Unique Hollow Cylinder Shaped] This cylindrical hollow design not only melts slowly and reduces dilution, but also keeps the drink cold and original flavor longer. And you can add various fruits or drinks to the mold according to your personal preferences, like lemon slices, diced strawberries, blueberries. it's versatile and can add a cool touch to your drinks! NOTE: Tumbler Cup not included in package. 2.[Thick Food Grade Silicone Ice Mold]Our ice cube molds are made of food grade silicone, which is BPA, odorless, flexible and elastic, and can be reused. You can DIY your favorite drinks, cocktail, Sprite, cola, juice, coffee with the creative ice cube mold in this summer! 3.[Versatile Size For Tumbler Cup]Our silicone ice cube maker can make 3 large hollow cylindrical ice cubes, perfect for cooling drinks in 30-40 oz tumblers. 1st+2nd Compatible with 30 Oz, 1st+2nd+3rd Compatible with 40 Oz cups. (NOTICE: The 3rd ice cube is not compatible with the 20 Oz and 30 Oz tumbler) 4.[Easy to Fill & Release]Simply pour water into the tray, cover it with the lid to squeeze out the excess air, place it in the refrigerator to ze for about 6 hours, then twist 4 thick stripes to release the ice cubes. The perfect ice cubes in various sizes, 1st+2nd Compatible with 30 Oz, 1st+2nd+3rd Compatible with 40 Oz cups. (Notice: The 3rd ice cube is not compatible with the 20 Oz and 30 Oz tumbler)