Idk if this is useful, but tiny rubber bands works for bobbin

A Guide to Collecting Vintage Thread • Adirondack Girl @ Heart

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I've been finding these small rubber bands inside my washer after loads. (Quarter for scale) : r/whatisthisthing

These are dresses my 10yo made for her dolls. The only thing she used were cut up party balloons. : r/fashion

Storage – My Time Stitching

Tutorial: An Easy Elastic Waistband

Suitable for most thread spools and bobbins, including Types A, A/15, & L 20 Assorted Colors: Blue, Purple, and Pink. Easy to use design. 2-5/8 inches

Set of 20 ~ Keep Your Bobbin Threads Matched Up with Your Thread Spools (Color Mixing-20Pcs)

Comparing my 2002 Majacraft Rose with the latest version – Whispering Pines Farm

Material: made of quality silicone, the assorted color bobbin holders tool feature smooth surface, durable texture, and flexible design that can be

Fbshicung 100 Pieces Bobbin Holder, Thread Spool Holder Stack Bobbins on Top of Thread Spools for Type A& L and M Bobbins for Embroidery, Quilting

Tenth Day of Christmas: Tools for Hand Embroidery! –

Knitting - Intarsia- how to deal with 15 colours in a row