There are three big functions:
1. Must have the quality performance,
2. Have the guaranteed performance,
3. The sealing effect is better.
After these three functions to achieve, under the aegis of food in such a tight there would be no what's the problem.Quality performance is to ensure the food in the warranty period does not go bad, will not change;Bao sweet performance is to ensure the food is authentic, will not change in character;Sealing effect is better in order to save food, food and oxygen, separated, such as water, stain to prevent leakage.