The Cola Gondola is made from forty 3-liter PET bottles. Each tube is pressurized to 5 psi* to add rigidity. The Gondola weighs just 14 lbs (6 kg) and is ‘really easy to car-top at 12 feet long’.
Here is a manual to make your very own: http://www.hometown.aol.com/Sneelocke/Cola_Gondola.htm
Andrew A. Kinsman
Cola Gondola (2004)
40 3-litre PET-bottles
Victor, NY, USA
*)A single PET-bottle can, according to this YouTube-movie, take up around 185 psi (12,7 bar), before bursting: http://www.youtube.com/watch?v=a_QvUC3EqxAUrl: