ok, i have 2 of these cup holders we got for the boat but they dont fit so now i am looking for answers to uses for lkie a bong or something. its exactly like this http://www.txpokersupply.com/images/hardware/RegularCupHolder.gif but it has 4 2/16th inch holes in the bottom. ikd what i want to use them for. maybe some kind of home made perc or sometihng. i need ideas. i have alot of stuff to make bongs and stuff like that with so any sugguestion i swelcome. remember, its 2 of them and both have 4 holes in the bottom. i have alot of materials so that isint a problem. i heva 3 liter bottles 2 liter bottles, pipes, duct tape, sockets, screens, i have everytihng i would need for most any home made smoking device. sugguestions please! idk what to make with them.