I recently stayed at a hotel which had these nubby soap massage bars. I really liked them but couldn't find a similar mold.
With that as my inspiration, i decided to super size the nubs and try this one out. I poured two different colors - the nubby layer as glitter, and the base is white. I love it! The nubs last longer than the original and they provide a gentle massage while showering. If you'd like to give this a try, let me know and I can post a few up on etsy.