I do a lot of quilting and I like to use the matching thread in the bobbin. So.....I've purchased about 20 or 25 bobbins and store them in 2 of those rubber ring sold at JoAnn's called bobbin savers. They sit in the bobbin saver without falling out and you can see the thread. Oh and I use leftover bobbin thread to piece my blocks. Rarely do you need a neutral color to piece with....no one ever sees the thread.