Toilet altars are popular in
cramped living spaces with little privacy, I think it came about for
mom's to have a private space and not be interrupted. I have one in my
bathroom. This photo is not mine, but mine is very similar, I will take
a photo and post soon.
It may sound crazy at first, but what
better place for privacy and to meditate then in a hot bath with your
altar within eye range. Not to mention the toilet is great source of
running water for urban practitioners to dispose of burnt items.