more information at www.watercone.com
Here is a really cool and simple technology. The Watercone is a solar still that can desalinate sea water or brackish water. The evaporated water condenses on the cone surface and then drips down into a small trough that also enables the cone to float on top of the dirty water surface that it is desalinating. The Watercone is the ultimate in decentralized small is beautiful/profitable technology. It can work because populations are spread out which means that the surface area required to harvest sunlight is not an issue, as it would be if you tried to make one centralized solar powered desalination facility. The device can create 1.0-1.7 liters of desalinated water a day. The base has a 60-80 cm diameter while the cone is 30-50 cm high.