Sturdy, crystal‑clear storage box that keeps up to 25 sewing‑machine bobbins organized and visible at a glance. The compact case prevents thread unwinding in drawers and notions tins while protecting bobbins from dust and travel knocks. Ideal for classrooms and multi‑machine studios where quick color identification saves time. Fits most standard domestic bobbins; perfect for organizing pre‑wound colors, specialty threads, or bobbins dedicated to specific projects and machines.