The pot-in-pot refrigerator, also known as a Zeer pot is a way of keeping food cool without electricity.

A clay pot is placed in a larger clay pot with wet sand in between, and a wet cloth on top. In this way, food can be kept fresh for much longer in a hot climate.

According to National Geographic, a zeer pot is "a storage container that's essentially two nested clay pots with a narrow gap between them filled with sand. The sand gets soaked with water, which, as it evaporates, chills the inner container so effectively that food that would normally spoil in two days can last two weeks."

External links

• MOHAMMED BAH ABBA

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  A TRUE HUMAN SCIENTIST
• Rolex awards site
• The Zeer Pot - a Nigerian invention keeps food fresh without electricity

Appropriate technology | Public health | Cooling technology