What harm does the cold water cup do to people?

Take the 55-degree cup as an example, the cooling cup is harmless to people. The cup is filled with phase change metal between the inner heat conduction layer and the outer heat insulation layer. The hot water releases heat to the phase change metal through the heat conducting layer, and the phase change metal absorbs heat and melts quickly, and the temperature of the hot water drops rapidly.

Subsequently, when the hot water is cooled, the phase change metal solidifies and releases heat, which can keep the temperature of the hot water near the melting point of the phase change metal for a long time, thus achieving the effect of heat preservation. Therefore, it is not rumored to use cheap materials such as "sodium acetate trihydrate, disodium hydrogen phosphate 1, gelatin".

Its declared "authentic" 55-degree cup uses food-grade 304 stainless steel and food-grade PP as insulation layers. Non-food grade steel may contain toxic elements such as manganese and nickel. Long-term contact may be harmful to the health, and it is difficult for ordinary consumers to distinguish between authenticity and falsehood.

Chemical properties of sodium acetate trihydrate;

Molecular weight: 136.08

Characteristics: melting point 58℃

Water solubility: 762g/L (at 20℃).

Appearance: white or white-like crystal.

Description: This product is colorless or white crystal, soluble in water, slightly soluble in ethanol or ether.

Uses: Suitable for manufacturing medicine, dyes and photographic reagents, and also the main raw material for manufacturing sodium diacetate.

Its phase transition temperature is about 58℃ and its latent heat is about 227 J/g..

Refer to the above? Baidu encyclopedia -55 degrees cup

Refer to the above? Baidu encyclopedia-sodium acetate trihydrate