pop can "tiles"

[tummymunkey.livejournal.com]

there was a recycle art show in vancouver (at the planetarium i think) a few years ago that exhibited a LOT of things made from "tiles" made from pop cans. they used the tiles for anything from floors, to tables, to chairs. and i think it was more than one artist who did it, so it shouldn't be so obscure that i can't find an example on the net! i tried to find an example on google but didn't see any. maybe there's another word for pop (ie soda) that i don't know about?

i'm curious how they would fold over the edges so that even the corners weren't sharp. do you think they had a machine?