Amazon.com: New brothread 3 Layers Stackable Clear Storage Box/Organizer for Holding 60 Spools Home Embroidery & Sewing Thread (Spool Size Requirement: Height≤2.2"/5.6CM; Width≤1.69"/4.3CM)
Amazon.com: The Quilted Bear Spool Box with Polyester Thread - Acrylic Embroidery Thread Organizer/Sewing Thread Storage Box with Strong Polyester Thread for Sewing Machines or Hand Use
Floriani New Edition 30 Spool Thread Set – Quality Sewing & Vacuum
Thread Box - holds and protects up to 30 spools of thread
Sewing Thread Storage Box Spool Thread Case DIY Craft Sewing Box Embroidery Thread Organiser for Household Accessories - AliExpress