Just got back from NYC where I ate a bunch of burgers and I can tell you: McDos and BKs are not looking as nice as European ones, the few restaurants I visited there where dirty and looked very aged and non-welcoming.
Don't get me wrong: Food was the same as usual, not worse, not better, but people in charge there should invest a little money on their restaurants look!
Anyway, here's a great idea from Brazil where apparently, BK still needs to impress their guests, and I think this campaign does it for real, I'm sure it's the first time you'd keep your burger's mayonnaise filthy packaging as a keepsake!