How big is the cork thermos?

The capacity of cork thermos bottle is 2 liters.

The capacity of ordinary old thermos is 2 liters. One liter is equal to one cubic decimeter, two liters is about 4-5 pounds, 1 pound is equal to 454 grams, about 2000 ml, that is, a little more than two liters. It can hold 2 kilograms of water. Also known as thermos, it was invented by British scientist Dewar.

The principle of thermos is that heat is divided into conduction, convection and radiation. The cork of the thermos bottle is made of cork, which is not easy to conduct heat, so as to prevent conduction as much as possible; 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.

Later, Berger made a shell out of nickel to protect the fragile glass bottle lining. At first, it was only used in laboratories, hospitals and expeditions, and later it was also used for picnics or trains. From 65438 to 0925, it began to sell popular cheap plastic thermos bottles.