They are "bobbins" to go with simplicity's fabric cutter or bias tape maker machine. I'll see if I can find a picture. I have a bunch of these.
https://www.amazon.com/Simplicity-Cr...+fabric+cutter
If you look real close on this winder machine you can see the fabric being wound on a white bobbin spool like you have
https://www.amazon.com/Simplicity-Cr...s+tape+machine
It is technically called a storage bin: Here it is on amazon
https://www.amazon.com/Simplicity-Wi...licity+spindle