vacuum flask

British

noun

Also called: Thermos. Dewar 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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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vacuum flask

Since developing the all-steel vacuum flask in 1913, the Stanley company has cultivated a particularly rugged, if not decidedly masculine, image.

From Salon ● Jan. 11, 2024

Spread under the trees was a picnic rug, with a large vacuum flask of coffee.

From BBC ● Jun. 14, 2013

I conserve water and electricity by boiling the kettle only three times a day, keeping the hot water in a vacuum flask.

From Time Magazine Archive

Rahel carried the Eagle vacuum flask with the boiled water.

From "The God of Small Things" by Arundhati Roy

She’d had a horrible dream: she had been given the vacuum flask she’d seen her father, Lord Asriel, show to the Master and Scholars of Jordan College.

From "The Subtle Knife" by Philip Pullman

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023