Ordered. I suspect the CHinese could make one that is reasonably accurate, say +/- .01, for <$2.50 It ain't rocket science at this point. Gee could probably source the parts and build for <$25. But he's not Chinese - to my knowledge.So don't have two glasses of wine with dinner, problem solved.
Or spend the 10 bucks on something like this, and if you blow high before you leave, maybe take a little extra time and grab dessert.
6.92US $ 30% OFF|GREENWON 68S Alcohol Tester Digital Alcohol Detector Breathalyzer Police Alcotester Backlight Display white box no manual|Alcohol Tester| - AliExpress
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No idea what this is. I was typing a secret word. fine, it's a squid