Scrub Daddy Sponge Mommy is a two-sided sponge, with each side performing a different role. Use the FlexTexture side to scrub off debris, then flip it, and use the soft ResoFoam side to soak up liquids and wipe the surface dry. Sponge Mommy's Flex Texture side becomes firm in cold water for tough scrubbing and soft in warm water for light cleaning. Sponge Mommy is safe to use on over a dozen different surfaces, including glass, stainless steel, cast iron, and non-stick coatings, and is scratch-free.