Food Grade Material The ice cube tray for the freezer is made of food grade silicone, non-toxic, FDA approved, 100% BPA free, keep your ice cream drinkable. Can be used in the freezer, oven, dishwasher, refrigerator and microwave. 108 independent letter grids Set of 3, green, pink and blue. Each ice tray has 36 grids, there are 108 grids in total, which will meet your greatest needs. You don't worry about less ice cubes. Unique letter shape can increase the beauty of ice cubes. Stackable and removable lid Each ice cube tray has a removable lid to help the ice cube tray make beautiful ice cubes and effectively isolate other flavors in the refrigerator, the ice cube trays can be stacked neatly, maximizing freezer space and keeping your ice cream fresh and odor free. Easy to release and clean The bottom of the ice cube tray is made of silicone, which is soft and durable and can be easily pushed from the bottom (it is recommended to wait 2 minutes from the freezer). It is also suitable for the elderly and children, and the ice cube tray can effectively prevent ice from falling. Non-stick design, the ice tray is easy to clean after use.