This document introduces retort pouches, which are flexible packaging that can be heat sterilized to increase shelf life and provide a convenient alternative to canned foods. Retort pouches were developed in the 1950s for military use and have since grown in popularity. The document discusses what retort pouches are, their history, advantages over other packaging, and characteristics of effective pouch materials. In conclusion, retort pouches have enhanced acceptance of ready-to-eat meals and provide competition to canned foods through their flexibility and ease of storage.