Safe and Non-Toxic,High quality materials } - The ice cube trays is made of safe silica gel and food grade PP. It meets the sanitary standard, is healthy and environmentally friendly, and the ice cube trays has passed the multi-pass inspection process and is more safe to use, you don't have to worry about child biting the plastic ice trays with your mouth. The ice cube trays can be properly pulled and bent and it can still be restored. Each ice tray can make 21 ice cubes (3*7).