MacMerc suggests a way to guarantee an iTunes song with every Pepsi bottle you purchase. I wish someone would figure out how to do this for the 7-11 cups. I’m currently at 7 songs with 38 cups (18% win rate).
[UPDATE: Tried it with a Sierra Mist and it worked well. If only I liked the taste of Pepsi or Sierra Mist. :-( Or if only the Mountain Dew-capped bottles weren’t so expensive!]
[UPDATE (2/19/04): As the Apple Turns has a hilarious take on tilting.]