dishwasher after use. Made of Free and Food Grade silicone material which is Approved to guarantee safety and durability. With the BPA silicone material made the bottom, it is easy to remove the ice cubes. Space-Saving Feature:-These easy-release trays could stack easily and securely in the freezer without sticking, saving some space for other items. In Pack:- 1 Piece Honeycomb Shape Ice Tray-37 Ice Cubes. Material:- silicone Your drink stays chilled for hours. No loss of flavor. Easy release of ice cubes. Easy to clean. Dishwasher safe. Please wipe out the trays with soft cloth. Please do not overflow the cells with water. Try freezing more than just water! Freeze coffee to chill your ice coffee without any dilution! Freeze juices and make your own special mixes. Freeze different sauces for easy and quick way to spice up your meal! Use the trays as molds for baking, making pop molds, etc.