thank you for the answer. unfortunately that doesn't work. I really wish you had a version of this that actually hangs over a door at the top instead of needing an attachment. It seems like a great product otherwise.
If the curtain rod is attached to the wall, you might be able to use the adapter depending on the shape of the rod. I've attached a picture of the adapter, which slides to adjust. One problem might be that the bottom will not be braced due to only curtains.
I've attached a couple pictures. The adapter didn't work for me because my doors are in a frame about 2" wide. I ended up hanging it on a bar clamp until I think of something better.
The suction cups it comes with Dont hold very well but I haven’t had a problem with swinging It also comes with pads that glue to the wall or tile but haven’t had a need to use them call
My doors sit in a frame of about 2". I had to open the adapter so much that the caddy was essentially hanging on a hollow plastic tube, so I'm using a bar clamp until I think of something better. I'm not using the suction cups because I need to slide the door to get into my tiny shower.
All the shelves including mirror are adjustable. I'm also a shower shaver; mirror can be placed anywhere on the bar, either inside or outside and mirror swivels and tilts.