How to: Outdoor Solar/Thermal powered hydro setup

I saw this online and thought it was sick, even if i dont grow the majestic reefer bud in it i can get some veggies this summer!

you could easily put a 2L bottle on top and make it happen.

http://digg.com/d1o7e8

or

http://www.instructables.com/id/Solar_Thermally_Pumped_Hydroponic_System/