This pragmatic approach was pioneered long ago, when marijuana became a unifying ingredient for appetite stimulation. This approach, however, starts at the other end. This is called re-purposing, and recycling.
From what I've observed of that, uh, "target audience," what might be more useful is a pizza box that turns into a lighter, since they're always losing those but seem to have no shortage of paraphernalia scattered about...
Never mind the pot pipe, but I am perpetually amazed at the brilliant designs of various cardboard shipping boxes and other containers. The designers of these things have really brilliant spacial skills and make a flat piece of cardboard cut and fold into a vast variety of useful objects. If I came up with some of these designs, I would be so proud, I'm not sure I'd be suitable for human company for months.
Back in the day my buddies had a place down town a bachelor pad. Many good times an many pizza were enjoyed there. Pizza two or three times a week was normal. Any ways one evening someone asked the pizza delivery guy if he wanted a cash tip or a bong hit. So short story long the delivery dudes use to argue over who delivered to that address. ::