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I think my brother got it from www.buy.com and it seems to be accurate - it goes up as you drink more and it decreases after you stop drinking - but I'm not sure how closely it resembles your actual BAC.Hey it was fun though. Good game!!!
Hhhmmm...as for the beer. I didn't bring any cuz of path studying afterwards. Although, I must say, I'm quite tempted by it sitting in my fridge right now. It's 0.08 now instead of 0.1, so I'm thinking I can only have 2. Where can you buy your own breathalyzer (I have heard that they're cheap as well)? Are they accurate?