Bobbin Sun (Bobbin Holder)

A no-tangle circular bobbin holder for Class 15/A Style bobbins (the most common kind).

One "sun" carries 10 bobbins. The clips pull the bobbins into pyramid-like protrusions that bear against the thread whether the bobbin is full or nearly empty; this prevents the thread from unwinding, assuring no-tangle bobbin storage.

EDIT: I started adding rubberbands around every two bobbin clips to keep the bobbins held in place well. At least with PLA, the clips relax over time and bobbins start falling out.

Recommend PLA or a similarly rigid material. In any case, consider printing solid or nearly so. One finds in one's 3D printing career that solid prints are just worth it.