It doesn’t cost a lot so everyone and their mother can join in the removing dead skin cells fun!
Essentially, you scrub your face with this thing instead of your hands (if you are into physical exfoliation). It has this little nub on the back (a handle, if you wish) which doubles as a suction cup:
Some of the ladies in the comments on this XOvain article suggest it can double up as a tool for cleaning brushes. Not bad for such a cheap little thing, eh?