These pretty-looking and effective copper sponges cleans extra thoroughly and gently. Use the copper sponges for your pots, pans, sink and steel surfaces to remove persistent dirt, limescale and rust.The soft copper threads won't leave any scratches or marks. Directions of use: Use wet only on surfaces with dirt, limescale and rust. Do not use of teflon or similar Wash the copper sponges at 60°C in a laundry bag