This $5.99 keychain breathalyzer takes only 5 seconds to give you either a green (under .02%), yellow (.02% to .05%) or red (over .05%) light which indicates your relative condition to drive a car. Thoughtfully the manufacturer also built in a mini-flashlight with which you could find your car keys. When I first saw this gadget I wondered how accurate something that cost only $6 could be. After a little thought I think most of the use is psychological. If you feel the need to use a gadget like this – just don’t drive and take the keys away of anyone you observe using one.

Keychain DUI Eliminator – with flashlight

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