These foot scrubbers I spotted on Amazon look rather interesting. I’ve seen bathmats before with plastic protrusions to scrub your feet, but these are exactly foot sized which makes it a bit easier for storage or hanging on the wall. You just stick them on the floor, add some liquid soap and shuffle your feet to the rhythm of the shower.
They measure 6″ x 11.25″ x 1.25″ and come in 4 different colors.
available at Amazon.com