How many liters of water can an old thermos bottle hold?

The volume of the old thermos bottle is about 2 liters. The volume of old-fashioned thermos bottles is generally around 2000 ml, which is a little more than 2 liters. It can hold 2 kilograms of water. 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 liner, which can reflect heat into the bottle without radiating it out.