These scrub brushes from Japan are highly effective. They're made out of natural materials and last much longer than plastic scrubbers. They just do not break apart. The scrubber on the right is a Tawashi Brush — it's a natural brush made from palm fibers which are tightly bound with thick wire. Great for scrubbing pots, or for scrubbing root vegetables without bruising the skins. The scrubber on the left is made from thin ribbons of fine-grit sandpaper. It's called a "Sandclean Scrubber" and it outperforms regular sponges and steel wool. You can find them at specialty Japanese stores or online at Korin.