Removable lid: use the lid to stack the ice cube trays, keep them clean and protect them from the odors that accumulate in the fridge. Close the lid to prevent leakage (note: the lid is not suitable for dishwashers and ovens). Silicone material (food grade): the ice cube trays are made of silicone and PP and are BPA-free. Silicone base for easy removal: the unique design of the silicone base makes it easy to remove the ice cubes. Rinse the base with water, press the base and the ice cubes will come out quickly. Mini ice box: each bowl holds a total of 6 large ice cubes (3 x 3 x 3 cm). Easy to clean and reuse: they are temperature resistant from -20 to 100C and are safe for use in the fridge and microwave. Ideal for use in the fridge and for storing baby food. This product is made of PP plastic + silicone base. Advantages: no special smell; no silicone oil leaks; best suited for small fridges; 6 compartments in one, no food waste. Cons: After removing from the fridge, rinse the bottom with water for 30 seconds to make it easier to spin out the ice cubes.