"On second thought I can't say for sure if we are tested for alcohol. Can they tell from what you supply them in that cup?"

YES...that and a few more, like Meth..........My wife is a State Licensed "Sample Taker" (lol)...anytime a trucker was involved in a accident.......... /urine/blood would be taken..many nights I drove her the 50 miles at 3:00 to the Hospital where the driver would be waiting