Keep your Hydro Flask collection squeaky clean with the Hydro Flask Water Bottle Scrub Brush, featuring durable nylon bristles and a non-slip grip. Water bottle brush has a round head for optimized cleaning. This bottle brush is compatible with all Hydro Flask bottles. This cleaning brush is long enough to clean your coffee tumbler and water bottles. Have this cleaning supplies at your kitchen sink for quick scrubs. This Hydro Flask product is backed by a manufacturer's lifetime warranty.