i really dont see why THIS is such a "great idea" u can make bongs and pipes outa way more inventive things then this, hell u could make a bong outa a human skull, the only problem u are ever faced with is the bowl.
I don't think that the OP meant that you'd be smoking out of a hamster cage, but rather that you could have a bunch of interchangable parts that you could assemble pieces/bongs out of...
^^ Im pretty sure that is what he meant. If something like that did come out you could technically have two story bongs. I don't know about you but i think that would just be insane. Probably not all the great, but at the same time insane.