yea man what i use for homemade bongs is you know the spring things behind doors with the little rubber top on it. unscrew it from the wall or the door rip the rubber top off and bam perfect bowl. if your looking for a downstem i just attatched the door stopper/spring loking thing to a bic pen body and melted it together it works great! and after a little use the resin seals the spring real good. great rips!