Amazon.com: Ultima Bobbin Cases, Two Pack – Two Plastic See Through Bobbin Storage Boxes – Each Bobbin Holder Holds 28 Class-15 (SA156) Bobbins
Bobbin Storage Box
Stitch Source Bobbin Storage Box - 744674220035
Amazon.com: Bobbin Holder, Bobbins Case Thread Organizer, Bobbins Spool Storage Box Holds Up to 84pcs Bobbins and 24pcs Sewing Thread Spools Compatible with Brother for Janome for Babylock for Singer (Box Only)