👉 A stopper is a type of product that is designed to protect or seal something from air, water, or other substances. It typically includes a protective layer or material that seals the container and prevents it from being damaged by external forces such as weathering, corrosion, or chemical reactions. Stoppings are often used in packaging, food safety, and medical settings. They can be used to seal containers, bottles, jars, and other materials to prevent them from leaking or bursting during transportation or storage