How about a thermos?
The biggest and most prominent time of a long-term thermos cup is to keep the temperature of water for a long time. As long as you bring a thermos cup, you can ensure hot water to drink. Excellent quality thermos cups can be filled with boiling water when the outside temperature is not lower than zero. After tightening the lid for 24 hours, the water temperature is still warm.
There is a vacuum layer in the thermos cup, which can not only keep the water temperature, but also make the cup body not hot. Even at the beginning of pouring, the temperature of the cup is only warm. You don't have to worry about burning your hands with a thermos.
Good sealing the sealing of the vacuum flask has a great influence on the thermal insulation performance, so the sealing of the vacuum flask is very good. Just take a thermos cup and put it in your carry-on bag when you go out. Don't worry about water leakage.
Fashionable and beautiful vacuum thermos cups are very fashionable and fashionable, and are deeply loved by people. Nowadays, not only middle-aged and elderly people who like to drink tea like to carry thermos cups with them, but young people also like to carry thermos cups with them. This is a trend.
The materials of the environment-friendly and healthy thermos cup are all healthy and non-toxic materials, which will not cause harm to human body. It is very helpful for our health to form the habit of drinking hot water and reduce the chances of drinking cold water, ice water or carbonated drinks.
Principle description of vacuum thermos cup
The key to keep the temperature of water is to reduce the diffusion of heat. The faster heat spreads, the more water cools. There are three ways of heat transfer, namely radiation, convection and transfer. Vacuum thermos cup is a product designed according to the three-minute transfer method of human body. The inner container of the thermos cup is coated with a layer of silver anti-thermal radiation material; The material of the bottle is not conducive to heat transfer and hinders thermal convection; There is a space between the inner container and the outer wall, which draws air away and forms a vacuum layer to prevent heat transfer. The design of this vacuum layer has the greatest effect on keeping the water temperature.
After reading this article about thermos and its principle, do you know anything about it? I hope it can be used as a reference for you to buy a thermos cup.