Generally, the holding time of a thermos bottle is usually 8~ 12 hours. If it's 45 degrees water. It should be cooled in a thermos for at most two hours.

A thermos cup is generally a water container and a vacuum layer made of ceramics or stainless steel. The top of the thermos cup is covered and sealed tightly. Vacuum insulation layer can delay the heat dissipation of water and other liquids in it, thus achieving the purpose of insulation.

According to the different capacity and caliber of the insulation container, the temperature that the insulation container needs to reach will be different after a period of insulation. The insulation time of the thermos cup is not the most important index of insulation quality, at least for human safety, we should pay more attention to the material.

The thermos cup is made of stainless steel, and stainless steel also has food grade. # 304 stainless steel is a nationally recognized food-grade stainless steel material with beautiful surface, good corrosion resistance and heat resistance. Its corrosion resistance and rust resistance are much higher than other stainless steel materials, and its cost is 1 times higher than that of 20 1 stainless steel used in ordinary vacuum cups. In order to be responsible for our life, we should use this kind of thermos cup with good safety performance.