Printed it using cheap natural white PLA with 3 walls and 15% cubic infill. It worked out quite sturdy. Supports are needed only for the hook region.
With a narrow hook it is unstable, so I made a version with a wider hook and recommend printing it. But in the photos there is a dryer with a narrow hook, it can also be used, although not as conveniently.
The dryer is also available as FreeCAD (0.21.2) source file should you require modifications.
The author remixed this model.
I added a wide hook at the back to hang the dryer on a rod up to 10-12mm thick. Supports are needed to print it properly.