In daily life, people usually use thermos cups to hold water for drinking, especially in winter. Will using a thermos to hold liquids cause chemical changes that are harmful to the body? Let the Water Cup Network give you the answer below. In fact, simply using a stainless steel thermos to hold boiling water is non-toxic and does not cause any harm to the human body　

1. Before use, clean the inside and outside of the cup (lid) with neutral detergent in warm water. To achieve the desired heat and cold retention effect of the cup (pot), it is recommended to first add hot water or ice water for preheating or pre cooling. Adding ice cubes during cooling will have a better effect. To prevent leakage, please tighten the switch and cup lid clockwise when tilting the cup body　

Generally, it is a container made of stainless steel with a vacuum layer to hold water. It has a lid on the top and is tightly sealed. The vacuum insulation layer can slow down the heat dissipation of water and other liquids inside, achieving the purpose of insulation. The thermos cup evolved from the thermos bottle, and the insulation principle is the same as that of the thermos bottle, except that people make the bottle into a cup for convenience