I used to keep a box of eight-inch floppy disks in my office. Whenever a colleague would ask to borrow a blank disk (in the 3.5" era) I would give them one of these eight-inch disks. Many of my colleagues were so young they didn't even know what it was, not ever having used even a 5.25" floppy. It was always a great conversation starter.

Until the era of thumb drives came along...