Pretty fuckin sweet

Heineken once again approached Habraken who teamed up with designer Rinus van den Berg and designed a building with oil drums for columns, Volkswagen bus tops for roof and the WOBO bottles for walls, but the structure was never built.

This seems to describe the building in the picture but it does say that is was never built so I'm a bit confused.
It says a shack and wall or the only things that exist currently. I think it would make for a great pool house or something.