Industrial designer Gabriele Diamanti created this award-winning solar household still for developing countries with limited or no access to fresh drinking water.
It works somewhat like an upside-down coffee maker: You pour seawater through the opening at the top, and the sun heats it during the day. The pressure forces steam through the nozzle leading to a watertight boiler, and condenses against the lid. The Eliodomestico provides up to 5 liters of water a day, and because the sun does all the work, there are no operating costs. The still is even made entirely of inexpensive, widely available materials.