An earthen pot to keep food cool.
A Zeer Pot is a fairly new invention, created in 1995 by a Nigerian pot-maker by the name of Mohammed Bah Abba who wanted to help Sudanese families to preserve their food. His invention won him the Rolex Award in 2000 and the World Shell Award for Sustainable Development in 2001.
Mohamed Bah Abba (1964-2010) from rural area of northern Nigeria developed the pot-in-pot refrigerator i,e, Pot-in-Pot Preservation Cooling System in the 1990s.
A Zeer Pot works through evaporative cooling. To make one, you will need two unglazed Terra Cotta pots that will nest together and leave a space between the pots, wet sand to fill that space, and a wet cloth. Place the smaller pot inside the larger pot, fill the space between the pots with the sand, and cover your pot-in-pot with the wet cloth. As the water evaporates, it pulls the warm air outward, causing the inside of the pot to be cooler than the outside air. Place whatever you want to keep cool in the inner pot.
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