A pouch is a small bag made from a single layer or a multi-layered laminate of paper, foil, and plastic films. The choice of pouch packaging equipment depends on the type of pouch, physical form of the product to be packaged, desired dimensions or volume of the pouch, and whether pouch forming is required or pre-formed pouches will be used. Specialized equipment may be required for the inclusion of a dispensing spout in the pouch or to make the pouch retortable.