Note the Bearikade canister has an O-ring seal that the makers say is periodically tested with samples of production cans in the bottom of a 10 foot swimming pool. Say no leaks at all, as long as O-ring is "clean." (www.wild-ideas.net) Seems like overkill to me. I mean, if the can works anyway, why submerge it? Best, Todd in Tarzana.