The gray color straw detail brush set is designed with long-lasting nylon bristles which are tough on dirty sippy cups. It is the perfect tool to clean the hard to reach inside area of long straw and the short straw of sippy cup baby bottle nipple...etc small detail brush in cone shape is ideal for big and small holes the spout brush cleans the spout and threads inside the cap the wall mount hook is for easy storage and keeps your kitchen clean and tidy. Parent Choice s products provide families with affordable high quality and household consumable options. we offer you a variety of products for your family s needs. Our products are conveniently available online and in Walmart stores nationwide allowing you to stock up and save money at the same time.