The breathalyzer works because you're body tries to remove some of the alcohol through your lungs, not because of leftover traces from the physical act of drinking. That's why none of the various things people stuff in their mouth to try to fool the breathalyzer work.

That's... I don't know where you got that from... Probation doesn't take blood samples. You pee in a cup. Trust me. I got 4 months left... And refusing a breathalyzer is so that you avoid blowing way to high on a DUI charge. If your twice the limit there's a stiffer penalty. By not blowing, you lose your license for a year automatically, at least in the state of Florida, but you can avoid fucking yourself by not submitting to a breathalyzer.