I got a bunch of 3X4 zip lock baggies at the dollar store. I put the thread and bobbin (if there is one) in the baggie. Then I throw it in a tub. I have 3 plastic tubs, neutrals, hots & cools. I probably have over 100 spools stored this way and I don't have a problem finding what I want. Keeps the thread clean, untangled and out of the light.