Do You Know That The Vacuum Flask Has A Cold Preservation Effect?

Now that summer is coming, there are fewer and fewer liquid beverages that cannot be filled in stainless steel vacuum flasks. The main reason is that the cold preservation performance of stainless steel vacuum flasks has been rationally used. Many people think that vacuum flasks are simply filled with boiling water, hot water, etc., and then kept At a certain temperature. For the standard vacuum flask, heat preservation and cold preservation are the same, so make use of the function of heat preservation. Especially in the hot summer, bring ice-cold juice or plain water when you go out, and take a sip when you are thirsty, which will quench your thirst and end it, and will not over-stimulate the intestines and stomach, which is good for your health.