I bought plastic containers in the hardware department at Menards. I believe they are supposed to be for screws, nails, etc. But I wanted a container that was 3 inches tall so that my spools could stand upright and these work perfectly. I believe they are 3 1/2 inches high and have dividers in them. I buy my thread from Connecting Threads and these containers work great; you can store about 25-30 spools of thread in each.