Yeah, there it is! The Glass-Bottle-Can-Collector. A solar water heater made from glassbottles, drinking cans and copper. Can be used for warm and cold climates. Very cheap but demands some efforts :). Made from mainly recycled materials! I made this system in Malaysia at Kahang Organic Rice Eco Farm where it is working now for almost half a year. Enjoy watching and listening to the nice world music!
The movie can also be downloaded in low quality here.
Please spread this knowledge and give me suggestions for improvements. As far I could find on internet, this idea has not been made before :) Thanks for everybody who supported me realizing this!