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Homemade Pot-in-Pot Refrigerator “Off Grid Fridge” Cools Air Down to 40F

A “Zeer Pot” is a clay pot refrigerator that uses evaporation to preserve food. Only clay pots, sand, and water are required. Check out this Zeer Pot test from desertsun02. Note: These are less effective in extremely humid environments but work well in many places.

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