保温瓶 — meaning in English

English meaning

• Dewar noun A double-walled flask, similar to a thermos, used to keep liquids at a stable temperature, especially in scientific and cryogenic work.
• thermos noun An insulated flask that keeps drinks or food hot or cold.

Senses

保温瓶 is used for these senses in English:

• dewar A vacuum flask; a vessel which keeps its contents hotter or cooler than their environment without the need to modify the pressure, by interposing an evacuated region to provide thermal insulation between the contents and the environment.
• thermos A bottle, flask or similar vessel having a vacuum between its inner and outer silvered walls; designed to maintain the temperature of its contents