The benefit of the thermos cup is undoubtedly the convenience of drinking water. At the same time, the thermos cup has the function of heat preservation and cold preservation. Focus on the drawbacks: Generally speaking, the regular production of vacuum flask will not cause harm to the human body, but we must say which one is less harmful, that is, the glass vacuum flask will be safer. Now, let’s analyze it: the glass vacuum flask is safer, because glass is a very stable substance, that is, the bad impurities contained in the production process will not leak out, but the disadvantage is that it is fragile. The stainless steel of the stainless steel vacuum flask is slightly different. Stainless steel is a metal composite and contains relatively active substances. It is inevitable that some impurities will appear during the production process, and these impurities will be somewhat harmful to the human body.
The above is from the root cause, but the stainless steel vacuum flask produced by the regular manufacturer is made of materials that meet the national standards, which is generally not harmful to the human body. However, some low-quality stainless steel vacuum flasks will inevitably appear on the market, and such vacuum flasks cannot be guaranteed to be equally safe. Finally, it is recommended not to use the plastic vacuum flask, because the harmful chemical substances inside are more likely to leak! If you understand, just adopt it!
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