Made from clay and not needing any power to run, it keeps vegetables fresh for up to a week and can even store dairy, according to Mansukhbhai Prajapati, its Indian inventor.
The fridge is made of a porous type of clay from Gujarat, the region in India where Prajapati has his workshop. You feed water into a 5 gallon holding tank at the top and it gradually drips down through the material. On a warm day, the water evaporates, cooling the clay and leaving the contents inside relatively cold. Prajapati says the fridge is eight degrees Celsius less warm than room temperature.