Probably the best... guerrilla promotion tactic

Carlsberg, a popular brand of European beer, garnered a lot of publicity for themselves when they littered the sidewalks of London with 10 and 20 pound notes. Each note had a word bubble coming from the Queen's mouth, stating, "Carlsberg don't do litter. But if they did it would probably be the best litter in the world," playing off their tagline, "probably the best...." Since they only spent about 5000 pounds, this left plenty of money left over to make those promotional glasses, coasters , and other bar accessories you find in the pubs.