Team members Adina and Jamie came up with the core idea. Then after using them for a few months, we made minor tweaks - such as having the slips be horizontal at the Main Library. Stuff like that.
We also used old audiobook cases that we added strong magnets to as patron name alpha-spacers.
We don't have a metal shelf for reserves at the Children's Library, so the slips remain vertical.
To save on rubber bands, we write the number of holds the patron has in the slip's upper left-hand corner. Their items will be to the right of the initial slipped item. It's an easy adjustment if more items are added.
⇠This is what the slips look like. Basic and to-the-point.
We use 5 mil laminating sheets and they've held up fine.