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vacuum flask

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Collins Concise English Dictionary © HarperCollins Publishers::

vacuum flask

an insulating flask that has double walls, usually of silvered glass, with an evacuated space between them. It is used for maintaining substances at high or low temperatures

'vacuum flask' also found in these entries (note: many are not synonyms or translations):

Dewar - Thermos - flask

Forum discussions with the word(s) "vacuum flask" in the title:

thermos vs vacuum flask

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