1.cute heart shape and square different from normal will provide more fun during DIY experience. 2.Each ice cube tray is separate from others and the ice cube tray is made of soft silicone, it is easy to take the ice out. No need to twist or hit, just push from bottom, you can take out a perfect ice cube. 3.Smooth surface make it easy to clean. 4.The ice cube tray with lids can block dust and prevent ic cube from absorbing other food odors in the refrigerator. 5.Suitable for families, parties and outdoor picnics You can use the stackable silicone ice cube trays to cool your drinks and make homemade delicacies, such as whiskey, bourbon, scotch, cocktail, iced coffee, chocolate, puddings, fruit jellies or add lemon slices or lime wedges to the water.