I stitch a lot (goes without saying really) and have always had this habit of collecting little piles of thread wherever I am working, which then get everywhere. The cats wear them and eat them and my clothes always have threads attached. Turns out that I am not the only crazy stitcher and those little pieces of thread actually have a name, an 'ort' is "the snippet of thread left over in the needle after finishing a section of embroidery"
You might like to read this blog to learn all about it
I started putting my threads in a jar which looks a bit boring and ugly so I have made a cross stitch cover for the lid which looks so much better and can even be used as a pin cushion in a hurry.