1, put the frozen ice cubes in a heat-insulating foam container, which has good heat insulation and cold insulation ability. The ice cubes can be stored in it for a long time and are not easy to melt. If not, they can also be wrapped with heat insulation materials such as foam or quilts.

2. Put the container for ice cubes in another larger container, and add a lot of salt into the larger container at the same time. The salt will absorb heat during the melting process, which will slow down the melting time of ice cubes. Of course, this method is only suitable for a small amount of ice cubes, and a large amount of ice cubes is not suitable for use.