If you're gonna buy a new bowl, just pack more than one and hit your own maybe? Or are you afraid of ruining the ritual of shared smokin'? I do enjoy that ritual, it's one of the ways we get past the society taboos of physical contact in a society that is frightened half to death of physical contact. (It's not direct contact but you have to be fairly relaxed about shit like germs and whatnot to share a bowl... and generally have to trust the people you smoke with enough to assume they didn't just suck some herpes infested dick or something.)