As easy as FILL, FREEZE, FLEX - Simply FILL your Skystone Home silicone ice trays with fresh, cool water. To avoid spillage, hold the tray from the bottom with the palm of your hand while filling and transporting. Place the trays in your freezer to FREEZE. Once firmly frozen, remove the trays and simply FLEX the silicone to loosen the cubes and push them out from the back with your finger. Then enjoy! (For really stubborn cubes, run the ice tray under cold water to loosen them up as needed.)