Smile! It's the second best thing you can do with your lips. What's the first? Kissing of course!! But we all know that it sucks to kiss someone with bad breath. You don't want to be mean to your lover by not kissing him or her, but bad breath is just nasty.

Thankfully, SEJU Engineering developed the Kiss Me Meter: a personal bad breath detector. (Yes, things like this DO exist!) It uses an MEMS gas sensor, equipped with a re-calibration function, to detect 5 levels of mouth smell and displays those levels in different colors on the LED display.

The site doesn't say much more about it, but judging by the photos, it looks like it may hook up to your cell phone in order to view your readings. Stay tuned because I'm going to track down this Kiss Me Meter and use it on my boyfriend (sorry hun, sometimes your breath stinks).

The Kiss Me Meter sells for $39.95. Or, you can go the non-tech route and just pop a Life Saver.

[via TechieDivas]