I was somewhat intrigued when I bought a coffee this morning and found that there was advertising on the sleeve. Although I can appreciate the clever marketing scheme (my attention was indeed drawn to the radio station ad enveloping my delicious coffee), if ads were regularly on coffee sleeves (or worse, the cups themselves!) then I would probably pay little attention.
And anyways, stop putting sleeves on coffee cups. They're completely useless and even counterproductive in the winter when half the lure of coffee is the warmth of the cup /rant