The biggest feature of the vacuum bag is that it is tightly sealed, and the outside air, moisture, microorganisms, and impurities cannot affect the contents of the bag, which is why vacuum bags are often used as food packaging bags.As a kind of food that requires fragrance retention, tea has a requirement for the packaging bag to be sealed, because only in this kind of packaging bag can the tea fragrance last longer. I really don’t know how people stored and transported tea in ancient times when there were no vacuum bags?Now, tea cannot be stored for long without a vacuum bag. The function of vacuum bag in tea packaging is that it not only has the ability to maintain quality, but also has the ability to maintain fragrance. It is a very high-quality packaging material.