Twitpic - Share photos and videos on Twitter i just got a poster in the mail, & it came in this big cardboard case. i was about to throw it out when i noticed i might be able to make some smoking apparatus out of it. So I was wondering if anyone had any advice or tips or previous experience to make a bong or something out of this. Btw its a long circular cardboard case. it has two caps, one on each end.