, First of all, the thermal insulation effect of domestic brands and foreign brands of thermos cups is not as different as everyone thinks. After all, vacuuming is not such a great technology. Of course, lax quality control and lack of technical attention are common problems in domestic production, and the details are determined. Quality! As the saying goes, you get what you pay for, but compared to domestic thermal mugs, the price of foreign brands of thermal mugs is often several times that of domestic brands, but the thermal insulation effect may only be 2 hours longer.
2. Use a thermos cup to make tea. The tea water is easy to become rancid and tasteless in a high temperature environment for a long time. Many nutrients such as tea polyphenols and vitamin C in the tea will be lost, and the nutrients such as protein and sugar in the tea will also be lost. It becomes a breeding ground for bacteria and mold growth. If you use a thermos to drink tea, don’t drink it after the tea has been kept warm for more than four hours, otherwise it will easily cause diarrhea.
3. The length of the heat preservation time does represent the advanced production technology of the heat preservation cup, but the ordinary heat preservation cup does not need such a long heat preservation effect. Imagine if you find that the water in the cup is still hot after working for a morning, this What a shame. Therefore, the holding time of the general small-capacity vacuum flask is slightly shorter than that of the “bullet” type vacuum flask that we often say.
4. The thermal insulation effect of the thermos cup will gradually deteriorate with the increase of time, because generally vacuuming cannot achieve an absolute vacuum, so a getter will be added to the cup to absorb the residual air, and The getter will have a “shelf life”, and the natural thermal insulation effect will deteriorate after the warranty period.
5. The heat preservation time of the thermos cup is shorter than the cold preservation time? Wrong, this is just a propaganda method of the businessman. In fact, it is almost the same. It is just between hot and cold.