Meaning & use
thermos
An insulated container designed to keep liquids such as coffee or soup hot or cold for hours.
See it in a sentence
She filled a thermos with hot tea before heading out on the cold hike.
He packed a thermos of ice water to stay cool during the afternoon game.
A note on using this word
Originally a trademark, 'Thermos' is now used generically and is often written without a capital letter.
Words with a similar meaning
flaskvacuum flask
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
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