I recently tried out this new thread from Lily called Scrubby at the request of my husband. It came in several colors and was relatively easy to use.
I crocheted a circle and a square. At first the scrubbies were a little rough, but after a use it was about like a loofah sponge. If you want to add a little color and variance to your shower scrubber, I would definitely recommend this yarn. Lily also put out a crochet book with cute little roses and pansies scrubbies that would make a great gift for a loved one or for a little indulgence for yourself.