DF Store Ice Shark Shape Mould Pretty Delicate Material:Thermal Plastic Rubber( non-toxic food grade). Soft, safe and healthy, easy to clean and keep. Flexible silicone ice cube trays are perfect for making party-themed ice cubes, chocolates, gelatins, and more. The ice cubes come out intact - not chipped or cracked. To get them out, push each cube from the bottom with your finger, for fastest and easiest results, wait for 5 minutes after taking the tray out of the freezer. This way, the ice cubes will pop right out. If you don't wait, your fingertip will be freezing while trying to push them out. We Still suggest put it into a hot water for a while before using to remove the silicone smell.