The key to the Dewar bottle being a reasonable liquid gas carrying tool is the internal manufacturing structure of the Dewar bottle.

The early Dewar bottle is actually a double glass container. The two glass bile walls were covered with silver, and then air was drawn out from between the two walls to form a vacuum. Currently, the production of Dewar bottles and the material used to produce them is also a key. The common material is glass. All surface materials are fully coated with bright silver or aluminum. In the middle is a double glass bottle bile. The vacuum state between the two layers is also plated with silver or aluminum. The vacuum state avoids heat convection and thermal conductivity. The glass itself is also a heat conductor, and the silver-plated glass reflects the heat inside the container.