As most guys know, an open zipper can be pretty embarrassing.
Well, worry no more. The ZipHolder makes sure you avoid such embarrassing situations, as it neatly and securely holds the zipper in place. The mechanism is achieved by attaching a small "rope" to the zipper handle which can be hooked to your jeans' button whenever you want to secure the zipper.
I would think it'd would be an annoying extra step to unhook it before you can zip down when you need to go the bathroom really fast though.
File this under the "I would have never thought this up, but I could surely use this" category.