This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A vacuum flask; a vessel which keeps its contents hotter or cooler than their environment without the need to modify the pressure, by interposing an evacuated region to provide thermal insulation between the contents and the environment.

"If you are serious enough to try it makes sense to rent a dewar to transport and store the LN2."

dewar vessel    Dewar flask   

physicist    chemist    vacuum flask    vacuum bottle   

Breuer    Brewer    bluer    brewer    buer    chewer    couper    ewer    fewer    fluor   

triiodide    tetroxide    pentoxide    narcosis    adn    fixers    trioxide    petrolatum    room    washout