Driving after drinking moderately; or, how do you know where .08 is?

[manpower]

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I had a friend that had one and we were playing with it one night, trying to see who was drunkest. Pretty much all of us are blowing .12 and we can't seem to get any higher than this. Turns out most of these things only go slightly over the legal limit so that people can't play these kind of games and then sue the company when someone dies, they can only be used to see if driving is safe.

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I've got one, it goes up to .40, so we do play those games...

I also try and keep it in the back of my car. It's nice to hop into your car after a night at the bars, check yourself, and drive home without checking your rearview every 2 seconds.