Under the right climatic conditions, the self-filling water bottle for your bicycle can harvest up to 0,5 l water in an hour´s time.
Drinking water is still taken for granted by many people, despite the long known fact there are over 780 million people that do not have access to clean water and over 2 billion people live in regions with water scarcity. Predictions for the future say that water availability will alarmingly decrease even further in many regions.
An industrial design student at the University of Applied Arts in Vienna Kristof Retzár thought about the problem and came up with an idea - he discovered the Earth's atmosphere contains around 13.000 km3 of mostly unexploited freshwater, so he created "a small, compact and self-sufficient device able to absorb humid air, separate water molecules from air molecules and store water in liquid form in a bottle." He named his device the Fontus.
How it works? Well, the description of the product on the James Dyson Award site says the device, mounted on a bike, basically collects the moisture contained in air and condenses it as safe drinking water on the go. In long terms - a small, two-parted Peltier Element cooler has solar panels, which generate the electricity needed to cool the upper chamber of the device, while the bottom part heats up. When the bike is in motion, air is pulled in, and then slowed down and cooled as it moves through the upper chamber, where it is stopped in order to separate the particles. The moisture from the air then condenses into water and drips through a pipe into the container (a bottle).
If you cycle for one hour in regions with high temperature and humidity values, the bottle could harvest around 0,5l water. The device will cost somewhere between 25 and 40 dollars.
Not bad. You will never need to stop cycling because you ran out of drinking water - you will be able to constantly produce it yourself and avoid dehydration when you're miles away from home!