We've been living in this house five years with this teeny, tiny cupboard for towels in the upstairs bath. Finally using a little space behind the bathroom door, we have a place for our towels.
I used this narrow, garage sale table. Then adding the things to make it work, tying them together with one common thread Rust-oleum paint.
Now we have plenty of space for the towels and it looks nice too. The things we can do with hidden spaces.