Take a ladder shelf and left out the bottom 2 rows to fit perfectly over the toilet. This could make for extra storage space without looking too bulky. http://hative.com/over-the-toilet-storage-ideas-for-extra-space/
Very often in small spaces, there's not room for overly large furniture or lots of extras. That's why the search for sized-down furniture can yield unexpected rewards -- even the three-shelf unit here. It offers just enough space for extra towels and toiletries, as well as pretty display space.