HIGH-QUALITY BOTTLE BRUSH: Made of PP boar bristles and a stainless steel handle, the bristles are well-arranged, dense, and durable. They don't shed easily, have moderate stiffness, and are smooth and elastic. Therefore, you don't have to worry about dirt in the bottle being impossible to remove or scratching it. IMPROVED DESIGN: Double-twisted wire and a stainless steel handle can be bent at different angles, making it comfortable to hold and perfect for cleaning narrow bottle necks or hard-to-reach places. The brush is equipped with a high-quality cotton tip attached to the head, providing an ideal combination of cleaning and scratch protection. It is BPA-free, and the handle won't rust, making cleaning safe and effective. EASY STORAGE: Each bottle brush comes with a hanging loop. After cleaning, they can be hung to dry and stored to reduce bacterial growth. When not in use, they can be hung on the wall or stored in a cupboard or drawer. VERSATILE APPLICATIONS: The 9 different sizes of bottle brushes are suitable for cleaning a wide range of containers, including bottles, straws, cups, carafes, and spouts of various sizes. A complete set of multifunctional cleaning brushes can meet your different needs.