"I noticed Gene replied to a post below indicating that these flips can peel the insert off a Bud Jones chip."

"I am planning on going to 2.5" x 2.5" mylar flips"

Jim, I do not use these flips. Don't even know what mylar flips are.
I have seen BJ chips stored in cardboard flips with a cellophane like window ruin BJ chips.