Want thinner shelves- Floating shelves above the toilet in this bathroom is much prettier and more useful than the pointless towel bar that was there. *Everything on the shelves is from Ikea. The basket holding the toilet paper is from Crate and Barrel.
One Shelf, 5 Ways: The Endlessly Versatile LACK Wall Shelf Unit
why not take the LACK shelf and flip it, so the shelf side is facing into the room? You might need to get a little creative with the mounting hardware, but this is a great way to create some semi-concealed storage and reduce visual clutter.