I've run off more deer with beer farts than I ever have with coffee.
I often bring a thermos of black coffee with me, never noticed it bothering the deer. A friend who takes his with some of that frou-frou smelling french vanilla creamer in it reported that it actually seemed to attract them.

I believe that deer will smell your breath (coffee or not) if they're downwind and you're a mouth-breather. Breathing through your nose should keep the coffee scent to a minumum. I had the "other reason" give me a fit yesterday in the morning. I had about 3 or so cups before heading out and it was telling me that I would need to get down and use the TP that I always carry for an "emergency." Just as I hung up my bow to get down. "HE" appeared at 25 yards. He was headed to the scrape at 18 yards which would likely have resulted in an 18 yard broadside shot at THE BUCK I've been after.

He saw my movement when I hung up my bow whcih ruined the moment and the "perfect" stand.![:@]

The biggest problem with coffee for me is i gotta pee to much! Lol!

i always wondered about this too! i will try an apple on the way to the stand.... vanilla frou frou creamer attracting them? i believe that completely... some bait scents have vanilla in them. i tend to drink a gallon on the way to the stand.. cup at home, cup in truck...