I'm not the best at photoshop, and obviously the rectangle things at the top would prevent an air-tight seal for your lips, but you get the point.
I have always wanted a chess set made of chillums(pawns), pipes(knight, rook, bishop) and bubblers(king/queen). the challenger has to load the board, and when you kill a peice, you smoke the bowl in it. one day....
it wouldn't work like that, if YOU kill a piece, then YOU kill the bowl in it. if don't take any of your opponents pieces, then you stay sober.
would you want it to be clear? it would also need to not really look like a rook because like you said it needs to create a seal... i mean, you could get it custom blown but it would literally cost you hundreds...