Uniquedaily.com says this innovative and discreet,  FDA approved personal breathalyzer key chain will keep you easily informed of your blood alcohol level — so you and your friends stay safe and responsible… even after an overly fun night on the town.  Small enough to fit in your pocket, this personal breathalyzer includes a timer to keep track of your parking meter and features a powerful LED flashlight for those dark parking garages and alleys. Sanitary and nearly fool-proof, simply blow into the top sensor for three seconds and test results are immediately shown via the colored LED indicator system.