An Austrian inventor has made a solar powered water bottle that condenses the humidity in the ambient air into drinking water.
http://www.dailymail.co.uk/sciencetech/article-2839124/The-bottle-makes-water-appear-AIR-Gadget-uses-solar-energy-collect-moisture-flask-ride-bike.html
http://www.dailymail.co.uk/sciencetech/article-2839124/The-bottle-makes-water-appear-AIR-Gadget-uses-solar-energy-collect-moisture-flask-ride-bike.html