Words / B1

THURM-os/ˈθɜːmɒs/

A thermos is a container that keeps drinks hot or cold for hours (also a flask; originally a brand name). An ordinary bottle does not insulate as well; a glass bottle may be banned on trips. Kit lists: a thermos is allowed; a glass bottle is not.

Meaning

A container that keeps drinks hot or cold for hours (also a flask; originally a brand).

Examples

• “A thermos on the trip is allowed; a glass bottle is not on the kit list.”
• “A thermos of soup in the packed lunch is fine; heating it in the science lab is not.”

Good to know

a thermos; also a flask. Contrast: a (plain) bottle / a glass bottle. Trips / packed lunches. Countable. Mix-up: thermal means to do with heat; a thermos is the flask.

Near in meaning

flask

New