When traveling or camping you can use dry ice to keep goods frozen in your ice chest. Depending on the size of the ice chest you will need between 10 and 20 pounds of dry ice.
Dry ice can be really useful if there is a power cut and your refrigerator and freezer is off for a long time. Food will stay frozen between 3 and 6 hours in the freezer depending on how full it is. The fuller the better, and up to twelve hours for a chest freezer. If you know that the power will be off for a longer period you will need to use dry ice. For 12 to 24 hours you will need ten pounds of dry ice.
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