I use pipe cleaners (cheap) through the thread spool and bobbin and twist together at the top of the bobbin. Works great! To keep the thread from unwinding from the bobbin, I give the thread a little tug when I finish winding it up. It kind of sticks between a couple of threads. Then the spool and bobbin pairs can go in a box or drawer, and they don't roll around. Because of the pipe cleaner.