Unique Design: Unlike other bottle cleaning brushes, our 28 cm mini bottle brush has dense bristles at the top, easily cleaning the bottom of bottles without scratching them. It comes with a detachable keychain for easy access and storage. Premium Material: The straw brush is made of 304 stainless steel and high-density nylon bristles, making it more durable, flexible, and resistant to rust and deformation. Perfect for home and kitchen use. Multiple Sizes: The set includes eight bottle cleaning brushes: a 28 cm mini bottle brush, a 19 cm straw brush, and a 9 cm detail brush. The different sizes and large quantity meet your daily needs and allow for frequent changes. Efficient Cleaning: The durable and flexible tubular cleaning brushes easily clean hard-to-reach corners and quickly remove accumulated dirt and stains, saving you time and effort. Versatile Use: This bottle cleaning brush can be used to clean most narrow openings, teapots, straws, tubes, drain holes, and is also suitable for parties, picnics, travel, and the office. It is easy to clean and carry.