Israeli entrepreneur Izhar Gafni has developed a prototype bicycle that is waterproof, humidity-resistant, eco-friendly, affordable and … made out of recycled cardboard. Despite the focus on low costs, Gafni paid a lot of attention to design and it’s really hard to tell that it’s made out of cardboard.
http://thenextweb.com/shareables/2012/07/12/this-could-be-your-next-bike-and-its-made-out-of-cardboard/