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

Le Blog de Frivole: Tatting Shuttles and Bobbins

HOYOLS 1/2 Inch Small Rubber Bands for Hair Ties Assorted Color Rainbow Elastics Mini Reusable Rubberband for Braids Braiding Colorful for Baby Girl Infants Toddler Supplies 1000pcs (S) Latex-Free : Everything

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)

Ooobop! tips – ooobop

Troubleshooting the Zig-Zag Stitch - The Ruffled Purse®

Shirring Without Elastic Thread

Hoppo Bumpo: Bobbin organisation for cheapskates

Restoring a Vintage Ashford Traditional Spinning Wheel – Jillian Eve

7 Unexpected Problems You Can Solve With Rubber Bands

Sewing Accessories Sewing, Sewing Tools Accessories