Definitions for "Thermos"
A generic term for the container used for carrying liquids, often included with lunch kits. Originally registered to the American Thermos Company, the name, like Kleenex, became a household word for any vacuum bottle.
vacuum flask that preserves temperature of hot or cold drinks
a doubly insulated can that preserves cold (hence the doubling of TzN)
Keywords:  radiant, barrier, type
a type of radiant barrier