Basic headband holder.
V1 - Cube based with a stand. Use super glue to attach base to rack. The thicker version of the base is slightly bigger and has more surface area for the glue to hold on. I had no problem with the original, but others might prefer a more solid connection
V2 - Rack has a hole for the base and is cylinder based. Print the rack_with_cylinder_hole.stl with supports, the hole the support is for is where the holder is inserted into no glue required