How To Make A Pot In A Pot Refrigerator
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A pot-in-pot refrigerator or zeer is an evaporation cooling refrigeration device which does not use electricity. It uses a porous outer earthenware pot, lined with wet sand, contains an inner pot (which can be glazed to prevent penetration by the liquid) within which the food is placed – the evaporation of the outer liquid draws heat from the inner pot. The device can be used to cool any substance.In a community or situation without electricity, storage of food long-term can be tricky. One simple solution is to build your own pot-in-pot fridge