If you have a lot of fabric and need something other than fabric you could use cottons, color names or intended use like quilt backs. Or you can also label with the old location name so you have an idea what the contents will be. I do this with kitchen items too. Knowing that the box contents are from "lower LH corner cupboard" would tell me that it has the plastic storage containers. "Misc Quilt Supplies" covers anything that you might want to slip by a unhappy helper.
Good Luck!