It is better to choose a 316 stainless steel thermos cup because of its higher corrosion resistance and heat resistance.
Due to the addition of molybdenum, 316 stainless steel has higher corrosion resistance and heat resistance. Generally, the high-temperature resistance can reach 1200~1300 degrees, and it can be used freely even under very harsh conditions. The high-temperature resistance of 304 stainless steel is only 800 degrees. Even if the safety performance is good, the thermos cup of 316 stainless steel is slightly better.
In addition, 316 stainless steel is used in food industry, medical equipment, etc. 304 stainless steel is mostly used in kettles, thermos cups, tea strainers, tableware, etc., and can be seen everywhere in home life. In contrast, it is better to choose a 316 stainless steel thermos cup.