Original floss holder from Jordan has very curvy shape and most of my teeth are straight, so I had to constantly adjust angle and motion to floss properly. Alas I modeled a new handle inspired by ROCS toothbrush. Printed from PETG it's not stiff enough for me but that was proof of concept. Once I reprinted it from ABS-CF it's stiff enough and I finally can floss without this weird shape bugging me.
The author marked this model as their own original creation.