When a freezer is not available, dry ice can be used to keep ice cubes frozen. The amount of dry ice required varies based on the size and location of the freezer. Gloves should always be used when handling dry ice to prevent direct contact with the substance.
The recommended amounts of dry ice are for a 24-hour period. Fifteen to 25 pounds of dry ice are required for a freezer located on the bottom of a refrigerator. A top freezer needs 20 to 30 pounds of dry ice, while a side-by-side freezer necessitates 30 to 40 pounds. A large chest freezer requires 40 to 50 pounds of dry ice to keep ice cubes properly frozen.