As far as I know, the price of thermos bottles sold in the market is generally around 150 yuan, which is a little more expensive and the quality is not bad! Nanlong thermos bottles can be divided into three categories: ① narrow mouth type. Also known as thermos. Small caliber, good thermal insulation performance, mainly used for boiling hot water, fried Chinese medicine juice, hot drinks and cold drinks. ② Big mouth type. Also called ice bottle. The diameter of the mouth is large, so it is convenient to take and put things. It mainly includes ice cubes, sorbets, cold drinks with containers, iced drugs, liquefied gas, anti-fermentation substances and so on. You can also use containers for hot food and hot drinks. 3 cups. It is usually called a thermos cup. Large caliber, small capacity, mainly used as tableware, can reduce the impact of environmental temperature on the contents in a short time.