Remember reading about a former NASA engineer who designed large clay pots that extracted water moisture by condensation and collected it for drinking. He espec

Remember reading about a former NASA engineer who designed large clay pots that extracted water moisture by condensation and collected it for drinking. He especially made sure that the material used was local and the construction methods didn't require any specialized equipment nor electricity. The target were some of the harder hit (in terms of draught) places in Africa. Internet search is failing me atm.