Is the inner container of thermos poisonous?

There is no poison in the thermos. The surface of the liner is not coated with any substance, but coated on the inner wall. Now more advanced technology is used, not silver plating, but aluminum compound. The bottle liner is made of glass, just like a mirror.

Those suspended substances are scale, don't worry. Let it stay for a while. As long as the gallbladder is not broken, you can't get wet. Once it is broken, it will not keep warm. That would be a problem.

It's not that you can't drink water without keeping warm. If you don't keep warm, it is mostly because the small button at the bottom of the gallbladder is damaged to release the vacuum in the gallbladder, which leads to insufficient heat preservation.

Extended data:

Distinguish whether the thermos bottle is warm or not

Listen: stick the empty bottle mouth to your ear. The bigger the echo, the better! This is a method to detect whether the inner container of a water bottle is broken. Those sounds are echoes of air currents. The bigger the echo, the better!

Quick test of boiling water: introduce half a bottle to one bottle of boiling water into an empty bottle, cover it, and hold the thermos bottle with both hands to test the temperature after about three minutes. If it feels hot, it means that the heat preservation performance is not good; If you can't feel the heat, it means that the heat preservation performance is good.

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