High quality material: - The bottle brush is made of high quality nylon wool, pig hair, eco-friendly fiber cotton + wooden handle + 304 stainless steel. The brush has soft cotton bristles on top, perfect for scratch-free cleaning. Perfect Design: - The unique handle design ensures that you push really hard without damaging the brush. Easy to use: - The bottle brush can be easily pushed into the bottle without deforming. Wide usage: - This bottle brush can be used for many purposes, it is perfect for cleaning soda glass bottles and other bottles and cups. Soft and flexible cleaning: - The brush can easily touch the bottom of the bottle. The unique shape of the brush makes it easy to clean stubborn stains on the shoulders and the bottom of the bottle, with a certain flexibility.