...so this is a bit of a conundrum. It's supposedly a 3.5" floppy head cleaning disk for DOS and Windows, but not the kind I'm used to using. And it happens to contain software! Grab a disk image here: https://archive.org/details/teac-3.5-floppy-disc-cleaner And here are those handy floppy disk holders: https://www.ebay.com/itm/3-5-5-25-Floppy-Disk-Cleaner-Cleaning-Frame-/303620862566