Our cats love to play with the little pull-seals you get in cartons of half and half. We call them milktops, and our house is full of them no matter how many we find and throw away. Since we moved into the new place, Stanley and Oscar have been battling over who can claim the most. Stanley seems to be winning.
He put these two on the couch so he could keep an eye on them while napping. It was an effective deterrent for a while, but Oscar just waited until he moved to steal them. The battle rages daily.