thermos flask

Definitions

Food

  • A double-walled vessel made from silvered glass or stainless steel in which the space between the inner and outer wall is a vacuum, mounted in a protective case and fitted with a closure. The vacuum reduces transfer of heat by convection and the silvering reduces transfer by radiation, thus the contents may be kept hot or cold for a considerable period of time (heat is eventually transferred by conduction). Other types of insulation, e.g. foamed polystyrene or polyurethane, are used for the same purpose especially in larger rectangular containers.

Travel

  • noun
    (written as Thermos flask)
    a trademark for a vacuum flask
http://www.dictionarycentral.com/definition/thermos-flask.html