Making cum cubes. Learn more. Add water to the tray to fill the compartments halfway, and freeze them for 20 to 30 minutes. Pop the cubes out of the tray, and store them in an airtight freezer bag or plastic container. You can also find trays that make ice in a variety of shapes. This way, the tray will catch any potential drips or spills. Not Helpful 1 Helpful 0. Water Ice and Sports Drinks. This is a common problem for travelers, who forget that ice cubes can be a hazard just as much as water in some places. Sangria, wine, fruit punch, and slushies are all great with fruit-flavored ice cubes. Include your email address to get a message when this question is answered. Place the tray on a flat surface in the freezer, near the back of the freezer if possible. Instead of using traditional ice cubes, fill your tray with coffee to ensure that the last sip of your coffee is as delicious as the first.