You guys who think you're getting poisoned aren't right. H2O2 is what is used in crest white strips, and it's great as a mouth wash. It would be as safe as or safer than using listerine as bong water, however safe that might be.

but i dont use a bong for its filtration purposes. I love a bong because it cools the smoke, and traps the smoke in for great THC delivery. that shit is balla.