Here's a good tutorial on how to make your own cookie cutters from the Roots and Wings Co. blog.
They list a grommet gun-type thing as one of the required materials, but I had a kit to make copper cutters that used strong double-sided tape instead. Obviously, the eyelets would be more permanent, but if you're willing to forgo that then the tape works fine.
This can come in handy for people who sell a lot of wedding favor cookies that need to be weird shapes, or who need to get a cutter that's a specific size. Sometimes it's faster to make your own cutter instead of trying to track down something that's super-specific.