How does an insulated water bottle work?

　　The reason why the thermos cup can keep warm is mainly because the heat transfer is blocked after vacuuming.There are three ways to transfer heat:convection,conduction,and radiation,so heat can be transferred even in a vacuum,but at a slower rate.

　　The effect of vacuuming can only be to block heat conduction as much as possible,but in fact,heat conduction still occurs.When the water temperature in the thermos water bottle is higher than the external temperature,the drop of the water temperature can be slowed down.When the temperature is lower than the external temperature,the rising speed of the water temperature in the bottle can be slowed down.Therefore,the vacuum insulated water bottle can keep both hot and cold.

　　What Is The Best Insulated Water Bottle?

　　Thermos bottles are made of stainless steel and knowing the difference between them will help you choose a better water bottle.There are more than 150 types of stainless steel,each with different properties.According to NSF International Standards,stainless steel used in food equipment must be 200 or 300 series.

　　①200 series

　　200 series stainless steels,such as 201 SS and 202 SS,although this series is also considered food-grade stainless steel,are more prone to corrosion or rust due to their high manganese content and very low nickel content.Therefore,it is usually used in industrial products and cannot be used in beverage utensils.200 series stainless steel is of lower quality and less corrosion resistant than other types of stainless steel.It still has a place in insulated water bottles due to its affordability.

　　②300 series

　　304 SS and 316 SS are austenitic stainless steels.Austenitic stainless steel has low migration rate of food harmful substances,can resist corrosion of various media,and has high hygienic performance and processing performance.Stainless steel products related to"food"must use 304 and 316 stainless steel.316 stainless steel is rarer than 304 stainless steel.This is an expensive high-end stainless steel.Mainly used in high-end equipment,such as aerospace,food machinery and other fields.The common food-grade stainless steel in daily life is 304 stainless steel(also known as 18/8),which has good acid and alkali resistance and strong corrosion resistance.

　　Overall,high-quality 304 stainless steel and 316 stainless steel are better choices when choosing a food-grade stainless steel water bottle than other materials.ervanflask As a professional stainless steel water bottle manufacturer,our wholesale insulated water bottles are made of 304/316/201 stainless steel.