A sachet is a small disposable bag or pouch, made from plastic, tin foil, or mylar, often used to contain single-use quantities of foods or consumer goods such as ketchup or shampoo. Sachets are commonly opened by making a small rip or tear in part of the package, and then squeezing out the contents. Sachets are known for their convenience, as they can be customized into concise styles. Sachet pouches are also preferred for the food and medical industries because of how they can preserve foodstuff and pills well in a compact and economical bag.