Food grade material: The ice cubes tray is made of silicone material. food grade, BPA free, nontoxic, odourless, no harmful substances.- Easy to release: High quality silicone, making it easy to release ice cubes. It is stackable, compact, fits any home refrigerator, oven and microwave oven.- Easy to clean: Smooth silicone surface for easy cleaning, rinse with water and dishwasher safe.- Easy to use: You just fill the trays with water and then slip the trays into the freezer. You also can fill it with fruits, ice cream, soda and wine to custom