What is the capacity of the thermos?

A standard thermos has 2000 ml of water, and there are two kinds of thermos, a small water bottle of about 2000 ml and a large water bottle of about 4000 ml.

The insulation principle of thermos bottle is to use a cork at the bottle mouth to prevent the convection of cold and hot air; The gap between the double-layer bottles and bladders is vacuumized, which solves the heat conduction; Coating a thin layer of silver on the bottle liner makes it a mirror for reflecting light and heat, thus using the silver layer to block the heat radiation from coming back. In this way, the heat will not be lost, and it will play the role of heat preservation.

Precautions for the first use of open water bottles:

1, check thermal insulation

When it is used for the first time, it is necessary to check the heat preservation after opening the bottle. First pour a small amount of hot water into the open bottle, let it stand for 5 minutes, and then hold the open bottle with both ends. If you feel hot, it means that the heat preservation of opening a bottle is poor, and if it is the same as normal temperature, it has good heat preservation.

2, salt cleaning

Open bottles need to be cleaned for the first time. Pour half a bottle of hot water into a boiled water bottle, then add a little salt and shake the boiled water bottle slowly. The water in the bottle can dissolve the dirt on the inner surface of the bottle during shaking, and the water bottle can be cleaned after repeated times.

3, white vinegar sterilization

The boiled water bottle needs to be disinfected with white vinegar for the first time. Mix white vinegar with boiled water and pour it into a boiled water bottle. Cover the bottle tightly and let it stand overnight. White vinegar has the function of disinfection and sterilization. Let it stand overnight, the bacteria in the boiling water have been eliminated, and then rinse it with clear water several times.