Two years ago XPrize announced a global competition encouraging innovators to find a sustainable and affordable way to bring potable water to anyone, anywhere. The device had to extract at least 2,000 litres of water a day from the atmosphere, use clean energy and cost no more than 2¢  a litre.

This weekend the winner was announced - Skywater/ Skysource Alliance - a team of sustainability experts from Venice Beach California led by architect David Hertz and inventor Rich Groden. Their winning device is called Skywater, a large box that mimics the way clouds are formed: It takes in warm  air which hits cold air and forms droplets of condensation that can be used as pure drinking water. The water is stored in a tank inside the shipping container, which can then be connected to a bottle refill station or a tap. Designers paired it with a biomass gasifier, which can be filled with wood chips, coconut shells or whatever biomass is locally available, as a low-cost source 

Find out more about the competition.