7-11 has special cups for each Presidential candidate. Supposedly, they'll scan the barcodes on each cup purchased and keep track of which candidate is most popular.
There are two issues with this -- first, my local 7-11 isn't scanning the cups. They're just keying in the coffee price. Second, when one candidate's cups run out, it's possible that people will just grab the next available cup. Of course, 7-11 is providing 20 oz cups in their regular design so... I guess we'll see.