A pot-in-pot refrigerator, clay pot cooler, or zeer (Arabic: زير) is an evaporative coolingrefrigeration device which does not use electricity. It uses a porous outer earthenware pot (lined with wet sand) containing 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, and requires only a flow of relatively dry air and a source of water. (Directly from wilipedia)
All you really need is:
Two clay pots (one smaller than the other)
Fine sand (masonry or beach/desert)
Lid
Put a little sand in the bigger pot so the smaller one fits in with the two lids at equal height. Have it placed so there is space between the two pots (space is needed for the sand). Fill the void between the pots with sand. Then simply soak the sand. Saturate it. The evaporation sucks out the warm air. Chuck in your food and cover it. When the sand drys soak it again.
The cool thing is its totally nature reliant. There are no mechanics. Its just physics. Because heat rises the bottom stays coolest. And its simple as fuck. And the hotter the dryer the better it works actually.
All you really need is:
Two clay pots (one smaller than the other)
Fine sand (masonry or beach/desert)
Lid
Put a little sand in the bigger pot so the smaller one fits in with the two lids at equal height. Have it placed so there is space between the two pots (space is needed for the sand). Fill the void between the pots with sand. Then simply soak the sand. Saturate it. The evaporation sucks out the warm air. Chuck in your food and cover it. When the sand drys soak it again.
The cool thing is its totally nature reliant. There are no mechanics. Its just physics. Because heat rises the bottom stays coolest. And its simple as fuck. And the hotter the dryer the better it works actually.
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