Bathroom Towel Holder

I'm no designer, but I actually have a wooden product like this at home and wanted something close to it. I found the model by trikko (https://www.thingiverse.com/thing:2012895) and decided that was a good place to start.

towel_holder_10mm_marble.stl:
I personally haven't tested this with a 10mm marble as I only have 15mm marbles. I used this as a base model for my designs for my 15mm marbles.

towel_holder_15mm_marble_v1.stl:
This is a scaled-up version of the 10mm design, it works well