Kayaks and boats made of plastic bottles

 

see pictures below

how about a pontoon boat or a pedal boat?

perhaps a bigger boat?

Thanks for the pictures Joe.  Some people has too much time on the hands! 

That is pretty awesome!!!    Reminds me of the guy that made his own island!  http://en.wikipedia.org/wiki/Spiral_Island

 Inspiring photos.  I have wanted to build a boat out of the trash we collect on the Team B-port trips.  These are perfect to reference. Thanks for posting them!

Left up to CA ... they would make him register it & undergo mussel inspections 

We did something like that at Cal Poly but with milk cartons.  I think it was a dairy science club fundraiser.  Good times.