Back a couple of months I became motivated to design a cheap solar water still that could be econoically provided to refugees, natural disaster victims, and the like. During my information gathering phase, someone sent me a link to a product that was astoundingly similar to exactly what I was hoping to produce.
Watercone is a super-simple solar water still. It’s a two-piece plastic design that uses nothing but the sun’s energy to produce over a litre of distilled water per day (depending on location, season, etc.) from any source water. Simply fill the dish with source water, float the cone on top, and at the end of the day take off the cap, invert the cone, and collect the distilled water.
Please see the HPL Water section for more information on water.