Over 1, 500 Silicone bristles clean glass, fine porcelain and smooth countertops. The second side has wavy silicone ribs for tougher scrubbing jobs plus a hard nylon tip to reach extra hard-to-remove dirt and grime. Safe to use on non-stick cookware. This fun and long-lasting scrubber will stand the test of time. For a thorough cleaning, simply put the sponge into the dishwasher.