The hot water meets the stainless steel cup wall with good thermal conductivity, and the cup wall conducts the temperature to the normal temperature water with lower temperature. After a certain time, the temperature on both sides of the cup wall is balanced, just around 55 degrees. The same is true of the water in the cup. The temperature of interlayer liquid is about 55 degrees, which is conducted to cold water through the cup wall, and then the cold water is heated to about 30 degrees.
Brief introduction of 55-degree cup instruction manual
The instruction manual of the 55-degree cup says that after adding boiling water, cover the cup and shake it for almost one minute before it becomes 55℃. This makes consumers feel amazing, and they think that the action of "shaking" is also mysterious. The purpose of shaking is to improve the heat transfer rate of liquid and make the heat transfer faster. In other words, it can become about 55℃ without shaking, but it may take a little more than a minute.
Add boiling water for the second time, with an interval of one hour from the first time, because if you drink the first cup of hot water immediately, the temperature of the substance in the interlayer should still stay at 55℃ or above. If you add boiling water, the substance in the interlayer will not heat up, and the water temperature will definitely be higher than 55℃, which will not achieve the effect of rapid cooling.
Refer to the above content: People's Daily Online-CCTV investigates the truth of 55-degree cup: aluminum alloy with salt water is called high-tech.