I bought one of those snap/lock container sets from Lowes. The ones you can snap more containers on. Then I take a hole reenforcement and stick it on one side of the bobbin and slide the end of the thread under it. Then I take a golf tee and put it through the hole in the bobbin and in the hole in the spool of thread. I got this idea from the Fons and Porter tip CD. I can then set the spool (Coats Clark -- large size) in the snap/lock container . Also I store my bobbins (with reenforecement holding the ends of the thread) in a 7-day pill container (one with straight sides works better than the one with the curved front. I can store five of my 221 bobbins in each days compartment (total of 35 bobbins). The lids snap closed and keep the bobbins in a orderly fashion. I use my AM/PM one-day pill container with the push down tabs for storing my smaller safety pins