There's a topic for a 101 uses for thread, lol.
Hubby gave me a handful of those disks that protect the bottom DVD in a multi-pack and asked if they would be any use. At first I thought they might be a bit floppy but after giving it a wee think, I reckon being see through, there's scope for making customised drop spindles by sandwiching nice paper or fabric between them. I'll give it a try and see how it goes.
A couple of nice things about the cd/grommet/dowel spindles are that they dismantle for popping into your bag when going somewhere boring with a bit of something to do, and that slipping off the CDs makes it easy to slide the spun wool off as a ball to pop into a jam jar for easy plying.