The lid principle of the vacuum travel pot

Vacuum sealing principle. There is a sealing gasket inside the lid of the vacuum travel pot. When the lid is tightly closed, the gasket is under pressure and forms a tight seal with the mouth of the pot, thereby preventing air from entering the pot and maintaining a vacuum state inside the pot. This sealing principle can effectively maintain the temperature of the liquid in the pot, keeping it warm or cold for a long time, and can also prevent liquid leakage, making it easy to carry and use.