I have a wall mounted ring in my bathroom for holding a glass. The glass is 60mm in diameter.
I recently bought a Nevadent electric toothbrush which uses the shaver plug to power the charger, but it's not long enough to reach my sink.

This model provides a place both for the glass and the toothbrush charger to use the same ring on the wall.

Probably needs to be printed with support unless you want to try printing it on the side.