I bought a foldable bathtub some time ago and it is SO MUCH better than what I was used to
You have to kinda sit in it but it means that you can submerge your whole body without your legs constantly floating up. It fits in my shower and can be stored away when I don’t use it
Tl;dr:
Bathtubs started small due to size constraints of rooms, but got smaller because it’s cheaper to manufacture and handle smaller tubs.
#savedyouaclick