If you get nervous that maybe you’ve had too much to drink, now you can have a more accurate test to figure it out.  Keep this little keychain on your keys and you’ll never have to worry that somehow you miscounted how many beers you have had.  Of course it also means if you ignore it and get pulled over, if the cop sees that, you’re going to be in even deeper trouble.  He’ll know that you knew full well and went ahead anyway, which means there isn’t a prayer that you’ll get off easy.

There are three different levels when you breath into the gadget.  Green means “good to go” yellow is “stop drinking” and the red light is for “How in the world are you still standing?”.  It also has a flashlight function for when you’re stumbling around in the dark.  Of course the keychain is very cheap, which might make you a little uneasy to trust it.  You can pick it up for $5.99 on Sourcing Map.

Source: eb$29.99