Take a note: this holder intentionally made quite loose so that one could easily store (and take out) toothbrush and its heads. It also makes holder suitable for toothbrushes up to 34 mm in diameter (and heads up to 14 mm in diameter).
One cut out is also shorter than toothbrush head which allows to know whose brush it is.
Honeycomb pattern for infill. Printed almost flawlessly without rafts and supports. Has minor defects, but I guess, mostly because my printer is not very well adjusted.