In my last life as a PO, I ran into alcoholics that would drink a combination of mouth wash and vanilla extract.
I don't know the numbers any more, but the combination was highly intoxicating. The alcohol per volume was higher than booze, did not smell like booze on their breath, and was cheaper than normal alcohol.
Jim
Hey Jim, do you happen to recall the mixture amounts? How many ounces of each, etc., money's tight this time of year.

(not an appealing recipe for sure)
In high school my one buddy used to chew cigarettes before going to his GF's house so she couldn't smell the beer on his breath. She finally told him she knew what he was doing and didn't like the smell of the tobacco either. Was like kissing a dirty ash tray.