Printed with a 0.4mm nozzle. Print with the back part on the bed so that the only support needed is for the lip of the shelf. I used Auto Organic support in Orca.
The walls are mostly only 2mm thick so infill can be down at like 15% and its fine as there is very little needed.
I stuck mine to the tiles with double sided tape.
The author remixed this model.
I only needed two toothbrushes to be held and also wanted a deeper shelf to a specific width for my needs, so this original was remixed with that in mind.