 Cryogenic storage dewar

A cryogenic storage dewar, commonly referred to simply as a "dewar," is a specialized container designed for the storage and transport of cryogenic liquids, such as liquid nitrogen, liquid helium, or other gases that have been cooled to extremely low temperatures. The design of a dewar is intended to minimize heat transfer from the environment into the stored cryogenic substance, keeping it at very low temperatures for extended periods.