Definition of packaging: the general name of containers, materials and auxiliary materials used in accordance with certain technical methods to protect products during circulation, facilitate storage and transportation, and promote sales. It also refers to the operation activities of applying certain technical methods in the process of using containers, materials and auxiliary materials to achieve the above purposes.Definition of flexible packaging: packaging in which the shape of the container can be changed after filling or removing the contents. The container is generally made of paper, fiber products, plastic films or composite packaging materials.