Question: will one beer show up on a breathalyzer?
Answer: Thus, one 12-ounce can of beer, one 4-ounce glass of wine, or one normal mixed drink or cocktail are all equally intoxicating, and give the same blood alcohol content (BAC) reading on a breathalyzer. ... Even if you drink coffee, you still need a full hour to expel the alcohol in your system if your BAC is . 015%.