This paper introduces the importance of thermos cup in daily life, emphasizing that it is not only a beverage storage vessel, but also an important tool for healthy life. The vacuum cup prevents air convection through the vacuum layer of the cup body, maintains the water temperature for a long time, and ensures that the taste and nutrition of the beverage are not lost, and improves the quality of life. It keeps you warm in winter and cool in summer. The article also reminds to regularly clean the thermos cup to ensure the health of drinking water, and proposes to consider choosing a smart thermos cup, which has a temperature display function.