Our silicone water bottle cleaner repels unpleasant odors and stains. Since silicone is non-absorbent, it cannot lather up like a sponge. For best results, add warm, soapy water to your container first, and then scrub away. The silicone bottle cleaning brush is designed to reach every corner of bottles to properly clean residue. Use the silicone brush to keep your dishes, bottles, sports bottles, baby bottles, infusers, flasks, thermoses, tubes, breast pumps, kitchen appliances, and more sanitary clean. Note: Not suitable for beer or wine bottles.