Gabion walls don't need any kind of drains because they are porous throughout. Gabions can be customized to make them more useful in public spaces. Gabions can be filled with any heavy material--diverse stones, metal artifacts, obtanium, etc.
I like the design of the glass wall & door with the wall only going as high as the toliet. Looks spacious this way for my small master bathroom. Cant wait till we get to remodel our small master bath like this. Don't want the black tile tho!