The corner in our shower needs a new shelf, with the following design considerations:
So this is, what I came up with:
Printed in PLA, because the water in the shower will not directly hit it and will be not that hot. Material4Print, PLA Filament, Anthrazitsilber.
Avoid an inner brim, as it will not be very easy to clean afterwards.
Reuse screws in the wall and drop it into place.
The author marked this model as their own original creation.