How many milliliters is a bottle of water?

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:

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.