What is the best material to choose for a thermos?

Drinking more hot water is not an absent-minded perfunctory remark, but a caring remark full of love. It is a happy thing to have a sip of hot water anytime in the cold winter. In winter, hot water gets cold easily, so we use thermos cups to keep it warm. From the old glass liner kettle to today's insulated cups, technological advances have brought convenience to our lives. The inner liner of the kettle is glass, and now the insulated cup liner is stainless steel, relatively speaking, stainless steel liner insulation cup is more robust and durable unbreakable, heat preservation time is also longer. Stainless steel insulation cup material is not a single, we are more common is 304 stainless steel insulation cup and 316 stainless steel insulation cup. 201 stainless steel, with a certain degree of acid resistance, alkali resistance, high density, polished without bubbles, no pinholes and other characteristics, is the production of a variety of cases, straps bottom cover high-quality materials. Mainly used to do decorative pipe, industrial pipe, some shallow stretching products. Can not be used as food containers. Here mentioned 201 stainless steel is because some unscrupulous businessmen using 201 stainless steel material posing as 304/316 stainless steel insulation cup, we must pay attention to identify when buying insulation cups. 304 stainless steel liner, containing more than 18% of chromium and more than 8% of nickel; high temperature resistance of 800 ℃, with good processing performance, high toughness characteristics, widely used in industrial and furniture decoration industry and the food industry. Medical industry. Most of the insulation cups on the market are produced with 304 material, which is relatively acceptable.304 stainless steel insulation cup liner can be used to hold tea and coffee, but the general durability of 304 is not as strong as that of 316.