I liked your new towel bar so much that I ran out to our PC to check on doing the same thing. Unfortunately our sky light comes right down to the ceiling in a curving motion, no flat area. I don't see any place to put the cups without drilling into the plastic sky light. So instead I got two command hooks and put one in the corner by the medicine cabinet and the other in the opposite corner. Then I took a short piece of clothes line and put loops in both ends. Now I can string the clothes line and use it. Not as nice as your pole, but it works.
