This flip top cap is a great way to securely close shampoo bottles. It is made of PP plastic and fits securely onto any 24/400 neck size bottle. It features a flip-top design, which makes it easy to open and close. The cap is designed to be air and watertight when closed, ensuring that it will stay securely in place. It is also easy to customize, allowing for color matching and metalizing to suit your needs. With its secure fit and easy customization, this product is the perfect way to safely close your shampoo bottle.