The Eliodomestico uses the sun to purify water. Gabriele Diamanti's Eliodomestico is an incredibly simple water purifier. So simple, in fact, that you just tip the dirty water in, leave it in the sun for the day and come back home to find up to five liters of clean drinking water waiting for you.
It works like a regular solar still, only it should be cheaper, easier to make and more portable. The Eliodomestico is made from terracotta pots and a metal “boiler.” The user pours water in the top, where it is heated by the sun and boils.
Gadget Lab, Solar Still Purifies Water With the Heat of the Sun
