Cooking bag is a composite plastic film bag can be heat-treated, it has two plastic containers and cans advantages of resistance to boiling water, therefore, also known as "canned soft." After ten years of use it proved that it is an ideal sales packaging containers. In food packaging, metal cans and retort pouch container and frozen food bags, compared with many unique advantages: keep food color, smell, taste and shape. Cooking bags thinner, in a relatively short time to achieve sterilization requirements as much as possible to preserve the food original color, smell, taste and shape. Easy to use. Cooking bags can be easily and safely opened. To serve, put together with bags of food heated in boiling water for 5min to open food, even without heating can be eaten. Storage and transportation convenience. Cooking bag light, which can be overlapped storage, small footprint, packaged food, less space is smaller than metal cans, can take full advantage of storage space, saving storage costs. Saving energy. Because cooking bags thinner bag can quickly reach the bacteria lethal temperature heating, the consumption of energy 30-40% less than the cans. To facilitate sales. Retort pouch packaging according to market needs or fit into different food, customers are free to purchase, in addition, due to the beautifully decorated, also greatly increased sales. Save for a long time. Cooking bags of food, without refrigeration or freezing, shelf life stability, comparable with the metal canister, easy to sell, but also easy home use. Lower manufacturing costs. Cooking bag manufacture composite film is lower than the price of the metal plate, and its production process and equipment are greatly needed for simple, so cooking bags at lower prices.