Here is a link to a site that specializes in, lets say. "Unique" gadgets for the bathroom, some of which can be used or adapted to RV use. I already have the self draining soap dish shown. But I am going to hold back on the "Shower Spike" water saver.
It looks like there are a lot more than 5 pages of stuff.
Including glow-in-the-dark TP (to save
battery power at night) An Emergency roll holder and a singing showerhead. AND... A portable bathtub for when you want to surf the web in comfort
Home : Bath Magazine