1.Simply pour water, cover with the stackable lid and freeze. Its better not to fill them up, otherwise the ice cubes will stick together.2. save more space in the freezer. The well-sealed lids can also keep ice cubes from absorbing odors and dust, so that you can enjoy the crystal clear ice!3. With a slight twist and push, you can release the ice cubes from the ice cube trays easily and effortlessly.4.great for drinks, soups, marinades, baby foods, and many other uses.Perfect for drinks on hot summer days, ice tea or lemonade pitchers, and of course summer cocktails 5. save more space in the freezer. The well-sealed lids can also keep ice cubes from absorbing odors and dust, so that you can enjoy the crystal clear ice!