1. We often add other auxiliary materials, such as stones or other substances, to increase negative ions or change other physical properties of water. Take negative ions as an example. Drinking water in plastic cups can't increase negative ions, stainless steel is the best, and glass ceramics are reluctant. But stainless steel also has a problem, that is, nickel release, but this is very small.
2, it should be noted that do not use stainless steel to drink tea. Usually tea contains a variety of vitamins, in addition to a large number of theophylline, tea sesame oil, tannic acid. Soaking tea in stainless steel thermos cup in high-temperature water for a long time will lead to the destruction of many vitamins in tea, a large amount of tannic acid and theophylline oozing out at the same time, and a large amount of tea sesame oil evaporating.
1, stainless steel thermos cup, double stainless steel inside and outside. The inner container and the outer shell are combined by welding technology, and then the air in the interlayer between the inner container and the outer shell is pumped out by vacuum technology to achieve the effect of vacuum insulation.
2. Stainless steel thermos cups are divided into ordinary thermos cups (the heat preservation time is generally not more than three hours after boiling water is poured in) and vacuum thermos cups (boiling water can be kept warm for more than eight hours through vacuumizing). Generally speaking, the thinner the cup material, the longer the heat preservation time.
3, but the cup body is easy to be damaged and deformed, which affects the service life; Measures such as plating metal film and copper on the outer layer of the inner container of the thermos cup can also increase the degree of insulation; The heat preservation time of large-capacity and small-caliber thermos cups is long, while that of small-capacity and large-caliber thermos cups is short; The service life of the thermos cup also depends on the cleanliness of the inner layer of the cup and the vacuumizing time, and the most important thing is the structure of the vacuum furnace.