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To make ice cubes with an ice tray, fill each compartment of a plastic, stainless steel, or wooden ice tray with an equal amount of water. For the clearest ice cubes, boil your water, allow it to cool, and then boil it a second time before adding it to the tray. Place the tray on a flat surface in the freezer, near the back of the freezer if possible. Allow the ice to freeze for about 6 hours or overnight, then pop the cubes out of the tray and store them in an airtight freezer bag or plastic container. To learn how to make other types of ice, such as using fruit juice or coffee, keep reading the article!