I use almost all cone thread, mostly the bigger ones. I use a bag that zips in a sandwich or quart size, whichever fits the thread. When I am quilting, I use the long arm bobbins, which don't fit my sewing machine to sew the binding on. This frees up the bobbin for future use. I know, I should just break down and buy some more bobbins, but why, when this system has been working for me?