What are the standards for stainless steel thermos flasks?

The national standard is "29606-2013" for the safety of insulation cups.

GB/T 29606-2013 standard specifies the terms and definitions of stainless steel vacuum cups (bottles, jugs), product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage, applicable to the storage of hot and cold water, beverages and other liquids (food) stainless steel key vacuum cups, bottles, jugs and other daily appliances.

Expanded:

National Standard 29606-2013 applies to stainless steel vacuum cups, flasks, jugs and other daily utensils used to store hot and cold water, beverages and other liquids (food). Thermal insulation cups are generally made of ceramic or stainless steel with a vacuum layer to hold water. They have a lid on top and are tightly sealed, and the vacuum adiabatic layer slows down the dissipation of heat from the water and other liquids inside to achieve the purpose of heat preservation.

There are three ways to spread heat: radiation, convection and transfer. Insulated cups within the silver cup gallon can reflect the radiation of hot water, cup gallon and the vacuum of the cup body can block the transfer of heat, and not easy to transfer heat to the bottle can prevent heat convection, thermos flasks, but also the application of the principle of magnetization of the water, that is, in the bottom of the bottle and the cap with a magnet, so that the water is magnetized.

National standard full-text disclosure system-standard number: GB/T 29606-2013