noun
- a container with double walls and a vacuum between them that keeps liquids hot or cold for a long time
Usage: often capitalized as a trademark
Examples
- She packed hot coffee in her thermos for the camping trip.
- The thermos kept the soup warm for hours.
- He filled his thermos with ice water before the hike.
- The construction workers brought thermoses filled with hot chocolate.
- My grandmother’s old thermos still works perfectly after twenty years.
- The thermos has a wide mouth that makes it easy to pour from.