Synonyms

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

He was pumping the air from the vacuum flask, and took no notice; it was as if he’d already forgotten her.

From "The Golden Compass" by Philip Pullman

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