How many milliliters is a thermos?

The capacity of a standard kettle is generally 2 liters (2000 ml).

There are two kinds of thermos bottles: two liters for small water bottles and four liters for large water bottles. The principle of thermos is that heat dissipation is divided into conduction, convection and radiation. The cork of thermos bottle is cork, which is not easy to conduct heat. Try to prevent conduction.

There is a vacuum in the middle of the kettle to prevent air convection as much as possible; There is also a thermos bottle with a silver-white liner, which can reflect heat into the bottle without radiating it out.

Thermal insulation principle:

The function of a thermos bottle is to keep the temperature of hot water in the bottle and cut off the heat exchange inside and outside the bottle, so that the "heat" inside the bottle can't get out and the "cold" outside the bottle can't get in. If you put the popsicle in a thermos bottle, the "heat" outside will not easily run into the bottle, and the popsicle will not be easy and convenient.

Therefore, it is scientific to call the thermos bottle a thermos bottle, because it can keep both "hot" and "cold". The thermal insulation of thermos is determined by the structural characteristics of thermos. It turns out that the inner container of a thermos bottle consists of two thin glass shells, with air evacuated in the middle and a thin layer of silver plated on one side of the inner container.

The bottle mouth of a thermos bottle is much thinner than its "body" part, and a cork can be stuffed on the bottle mouth. It is this structure that makes the thermos bottle become a thermos bottle with a warm heart and a cold appearance.