Scrub Daddy FlexTexture Dye Free Scrubber is safe to use on over a dozen different surfaces, including glass, stainless steel, cast iron and non-stick coatings. Scrub Daddy's FlexTexture becomes firm in cold water for tough scrubbing and soft in warm water for light cleaning. A versatile design means he’s the right tool for every job. It is lab tested to remain odor free for up to 8 weeks. Scrub Daddy is designed to fit comfortably in the hand, providing good grip and wide coverage so you can spend less time scrubbing. With a design that cute and functional, it’s hard not to smile back.