Who will you be smooching this Valentine's Day? Make your decision based on a very scientific measurement with the Kiss-o-Meter ($30).
Even though it sounds like it's judging your smooching prowess, it's actually a tiny bad breath detector. The lights tell you if you're good to go, or conversely, if the person you're about to lock lips with is. But the secret's out; if someone whips this out to use on you, try not to be too offended.
It's definitely better than someone whipping out the super-obvious Halitosis Detector.