A paper towel holder I designed with polygons, circles, and macaroni shaped cutouts. No rod is needed, just print 2x, use paper towel roll to measure the appropriate distance to mount them from each other, add a few millimeters to make it easier to insert a paper towel roll, then install using 3 countersunk-head screws for each side. Gently spread apart to remove or insert a new roll.
The author marked this model as their own original creation.