I wouldn't want to flavor a bong rip, plus; with bongs I usually get to the point where I can't taste anymore lol. If you want flavor, go get a grape dutch; they make amazing blunts imo. And some mouthwash's have alcohol content don't they? wouldn't that absorb some thc lol?
Yea I'm a big "noob". My bong is ruined now...we don't have water at our house because I'm amish and now I can't clean out.
You can put anything you want in a bong. I like arizona ice tea, but water is what goes into my pieces 95% of the time.