vacuum flask

noun

🔊/ˈvækjuːm flɑːsk/

🔊/ˈvækjuːm flæsk/

(also flask)

(both British English)

(North American English vacuum bottle)

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a container like a bottle with double walls with a vacuum between them, used for keeping liquids hot or cold 真空瓶；保温瓶；热水瓶；冰瓶compare Thermos