You can fail a Breathalyzer by using alcohol mouthwash.
I know someone who has to use a Breathalyzer on his vehicle and he failed so the truck wouldn't start. And all he did was brush his teeth.
I remember watching Family Tides years ago. Tom Hanks was the alcoholic uncle in the episode and drank extract for his addiction. I came across how to make your own extract: vanilla, orange, lemon, ect. You use a pint of vodka and x amount of the natural flavors. Amazing how much alcohol is in it.