Sounds to me like the containers might be useful to store extra cut binding, or 'basting' safety pins. Don't know if they are big enough to hold all the iron on seam tape I have, but it's worth a try. Also, if you do machine embroidery and buy the little skinny spools you could probably fit several in one container - sorting them by colors. Would be useful to carry thread and bobbins to Sewing Bees keeping them organized, clean and 'not lost!' That is all I can think of right now. Merry Christmas and Happy Sewing Year ahead!