The solution to your soap dish needs: loofa's a naturally grown gourds. They are 100% biodegradable and will outlast your shampoo bars 10 fold. Preserve your solid bar products by placing each bar on a loofa, and allowing your bars to dry and be stored on the loofa.
The Loofa sponge is composed of slightly rough fibers that are can double in being a very helpful exfoliant for your skin.