http://www.scienceinafrica.co.za/2004/september/refrigeration.htmThis is a zeer pot. You have two clay pots, one nests inside the other. Fill the space between with sand, keep the sand damp, and the evaporation keeps the interior pot cool, but maybe not by much.
The article says adding water is required maybe 2 times a day. Anybody know anything about this? I'd be willing to think it would be cooler inside than ambient air, but I'm not willing to think I'd keep my milk in there for a few days.
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