Team Aquaduct created this bicycle as part of the IDEO Innovate or Die contest sponsored by Specialized, Google and Goodby Silverstein & Partners as a solution to the lack of clean drinking water for billions of people in developing countries.  The video says it all, but if you don’t have two minutes to spare, here’s the gist:
You pedal, it pumps water from the storage tank in the back through a filter to the container in the front.  It keeps the purified water in a closed container, maintaining its integrity and making it easy to use.  The added benefit is it makes transporting water much quicker and easier since many third world residents must transport water up to three miles or more just to get it from source to home.