This moss rug is perfect! I found it on Environmental Graffitti Blog.  - “Created by Switzerland-based industrial designer La Chanh Nguyen, the small indoor greenspace features three types of live green mosses - ball moss, island moss and forest moss - that grow in individual “cells” of plastazote, a decay-free foam” The moss carpet absorbs bathroom moisture. Mosses flourish in damp, humid environments such as bathrooms.  You probably will need to have a window of some sort in the bathroom because i think moss also likes sunlight, but otherwise this is a great idea.
I always wanted to have a bed out of moss.  Moss is really soft and good to sleep on.  I know this from experience. Once I was in the forest and I was very tired. I found a large field of moss the size of a bed. I slept on it for three hours.  The idea of moss as a carpet or rug is only natural. In fact, I am seriously considering growing my own moss rug. 

February 12, 2009 by Designsquish