100% BPA Free Food Grade Material--These ice cube trays consist of food-grade silicone bottom and PP lid, BPA-free, safe and reusable, rest assured to use it for adult/baby food. 1-pack ice cube trays create 21 ice balls at a time.Easy to Release--Flexible, non-stick silicone bottom tray makes it easy to slide out ice balls with perfect shape. You’d better leave it alone for a while after taking it out from freezer, then push from the bottom.Stackable & Hygienic--Each ice cube maker has a removable lid, which designed to block odors and dust, prevent leakage, also makes 3 packs ice ball trays can be stacked neatly in the freezer to save space.Durable & Quality--High-toughness silicone bottom ice cube trays are unlikely to crack or break like stiff plastic trays after freezing. Resistance to low/high temp (-4~212), safe in dishwasher.Widely Use--Fill with mint, fruit, yogurt, or juice to create ice cream, popsicles, baby food or jelly. Also make pure ice balls to chill your whisky, cocktail. Enjoy cool summer with cool ice trays.