These ice cube trays with lids are made of food-grade silicone and PP safe material that is BPA free. Each ice compartment makes 21 appropriately sized hemispherical ice cubes. The bottom of the ice cube trays with removable lids are made of flexible silicone, each ice cube compartment is individual and the ice cubes exit from out of the tray very easily. The removable lid is perfect for preventing the ice cubes from absorbing the flavors of other foods in the freezer and also allows stacking without spilling or sticking together. This ice cube tray can not only hold water, but also fresh juice (lemon, lime, pineapple, etc.), drinks, wine, etc. You can customize your favorite frozen drinks, or you can use these ice trays can freeze homemade baby food. Homemade safer. These silicone ice cube trays are easy to clean and reusable. They are perfect for home use, as well as for parties and bars, etc. They are also the perfect gift for family and friends. Enjoy the cool feeling together.