Plastic flip top lids are a common type of closure for plastic cosmetic packaging. They are easy to open and close and provide a secure seal to keep products fresh. Flip top lids are often made from polypropylene, which is a lightweight, durable plastic that is resistant to chemicals and moisture. They are widely used for packaging a variety of products, including shampoo, lotion, and hand sanitizer. The size and shape of the flip-top lid can be customized to fit different types of containers, and they can be decorated with printing or labels to enhance the appearance of the packaging.