I got some 3X4" ziploc baggies. I put the thread and bobbin (if I have one) in the baggie & seal. Then I throw the baggie into a plastic shoe box. One for neutrals, one for pastels & one for brights. The baggie keeps the thread clean, the bobbin with it and keeps both from unspooling. this size bag will fit the essential thread spool size (1200 yds) from CT. I get the baggies at the dollar store.