A vacuum bottle is an insulated container that utilizes the principle of vacuum insulation to minimize external heat conduction, convection, and radiation. Its principle involves placing two adjacent glass bottles, one inside and one outside, with air evacuated from the bottle openings to create a vacuum. Due to the insulating properties of a vacuum, heat inside the bottle cannot be transferred to the outside through conduction, convection, or radiation, thus achieving an insulation effect.
The insulation principle of a vacuum bottle essentially utilizes the insulating properties of a vacuum. By designing multiple layers of insulation, it minimizes heat transfer, thereby achieving an insulation effect. Therefore, unlike ordinary insulated cups, vacuum bottles offer superior insulation, for example, maintaining hot beverages at an ideal temperature for a longer period.
