I've been to a lot of conventions where everyone gives away can koozies [cozies]. On a recent fishing trip, I took a few along to keep everyone's beverage of choice cold. When we use leader on my boat, it comes off the 234-inch spools. As we pull it off, we have to secure the tag end so it doesn't unravel. We used a rubber band or tape for that job until the day I brought too many koozies along. I looked at the two and decided to try to put the spool in the koozie, and it fit perfectly. Now we slide a spool of line into the koozie and leave the tag end out, pulling off as much as we need.