vacuum flask
noun /ˈvækjuːm flɑːsk/
/ˈvækjuːm flæsk/
(also flask)
(both British English) (North American English vacuum bottle)
- a container like a bottle with double walls with a vacuum between them, used for keeping liquids hot or cold
compare Thermos真空瓶;保温瓶;热水瓶;冰瓶