TIL the first practical roadside breathalyzer was used in 1931 and it was called the Drunk-o-meter.

https://en.wikipedia.org/wiki/Breathalyzer?wprov=sfti1
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gaazxy/til_the_first_practical_roadside_breathalyzer_was/