When people visit relatives and friends far away, they often bring some special products from their hometown wrapped in aluminum foil bags or special dry snacks of their own masterpieces, which will show their sincerity and kindness. The so-called courtesy is light and affectionate. The important thing is that mind. However, some foods are ready-to-eat cooked foods, and they will easily deteriorate during the carrying. Therefore, there are many things that are very delicious but cannot be taken away. I am afraid that they may come into contact with the air on the road and cause microorganisms in the food. Deterioration due to mildew may also be due to the loss of the original taste of the food due to too long time. Vacuum packaging has the effect of preventing the entry of air, resisting external pressure, and maintaining the freshness of food.