Friction-fit standard size toothbrush travel case. Fits toothbrushes smaller than ~19cm long. A 2mm hole has been added to the top to allow some airflow.
I used UP PLA. With 0.3, some banding on the curved end occurs, but looks great otherwise. Print both sides with the end up. Supports are needed for the inner and outer ridges on the friction-fit parts, but should not be necessary for the ends.