1.Wash the Ice Cube Trays in warm and soapy water before first use and rinse and dry completely or place in dishwasher 2.Dont use sharp objects like knife on the silicone. 3.Besides water, you can fill the ice cube mold with fruits, baby food, coffee, milkshake, vegetable puree, hard candy, ice cream, soda and wine to customize your favorite flavor. 4.Stackable with lid that allows you to make nice cubes while preventing spills and the freezing of excess water and keeps ice cubes from absorbing freezer odors.Moreover,these trays stack easily ,And the ice tray with cover can be easily in the refrigerator to save space,Clean and tidy. 5.The flexible and separate flat cube compartment, which makes it easy to release ice cubes from the bottom. Our small can be easily twisted or pushed from the bottom to remove ice cubes and balls for an easy release.