Not to get too far off the thread here, but those 5.25" disks were pretty resilient. I remember back one day at our local computer store, I was waiting for my mom to finish the paperwork on our brand new Atari 800 (Hey, I was only 11), anyway, dude at the desk behind the counter is eating a sandwich, big gob of jelly falls on a floppy disk on his desk. Chaos ensues. Another dude takes the disk, slits it open, takes out the really floppy part, rinses it off in the bathroom sink! Slits open a new disk, inserts the now dried floppy in the new empty 'envelope', puts it in the drive and copies that data!
I was floored. Alas, I only got a 410 for my computer that day, had to wait a while before I had disks