[Special diamond shape]: large extra large ice cube moulds make 4 large 2 inch diamond ice balls. ice trays for freezer size: 10.71in*2.95in*2.36in. You can not only fill the ice mould with water, but also cocktails, whiskey, wine, fruit, puree, ice cream, complementary food, baby food or candles. [Durable food grade silicone]: The ice cube tray balls are made of food grade pp and is a flexible, non-stick and washable ice cube tray. Unlike other hard plastic trays, our iceball makers retain their shape when the ice is removed.These round round ice cubes tray is durable, BPA free and odorless. [Easy to use]: To make the diamond shaped ice balls by the whiskey ice cube moulds, 1) Fill the bottom mold 2/3 full with water.2) Slowly press the lid of the ice mold. Let the overflowing water stay on the lid. 3) Freeze for at least 7-8 hours. 4) Let thaw naturally for a few minutes. (Do not pour hot water as it may break the ice). Open the mold and gently turn it to release the ice cream ball. [Stackable Lids]: Our ice ball moulds can stack easily and neatly in the freezer and will not stick together. Sphere ice mold is tidy and saves your room in the freezer. [Use the scene]: Long lasting ice cubes for cocktails, iced coffee, iced tea, fruit juice, punch, lemonade, water, etc. The sphere ice cube moulds great for parties, home bars, restaurants, beaches, vacation events and Christmas gifts.