Thermos

/ˈθɜːrməs/

Synonyms

  • insulated bottle
  • thermo container
  • vacuum flask

Slang Meanings

A term used in casual contexts to refer to someone who is overly prepared.
He's such a thermos, always bringing extra snacks and drinks everywhere.
Used to describe a person who is cool under pressure, comparing them to a thermos that keeps things stable.
In a crisis, she's a total thermos—nothing seems to faze her.