Thread Holders / Embroidery Floss Bobbins

These are thread holders for embroidery thread.

I printed these using Flashforge white matte PLA, which happens to take sharpie marker well, for labeling.

Three shape options are included. For me, these print in 15 to 18 minutes each. Multiple can be placed on the print bed at once, but since they're thin, it seemed to make print lines slightly more visible on the top surface.

The slots at the bottom must be narrow to hold thread well, but if they are too narrow, using -0.1 mm “Horizontal Expansion” in Cura would likely be enough. (I think the equivalent in PrusaSlicer is “XY Size Compensation”.)