I am NOT making this up! I actually saw it at the Seju booth. The Korean company has built a business based on using "micro-gases" to detect alcohol (the Safe Driver), hydrogen (Micro Gas Sensor), gas (EZ Gas Check) and now the biggest gas threat of all, bad breath (Kiss Me Meter.)

The PR person on booth duty cheerfully explained that the Kiss Me Meter detects the specific gases from your teeth or stomach, and shows 5 levels of mouth smell in different colors of LED display. Blow on it and in a few seconds it will react negatively to Hydrogen Sulfide, Hydrochloric Acid, cigarette, and garlic/onion odors. "You'll never face an embarrassing social situation again!," she enthused. She recommended I attach it to my cell phone. ( Sheesh...what was she trying to tell me? )

Available for around $30.