이중 벽 사이의 진공 공간을 통해 내용물의 온도를 뜨겁거나 차갑게 유지하는 용기.
A container that keeps a drink or other fluid hot or cold by means of a double wall enclosing a vacuum.
예문:
"She poured steaming hot tea from her thermos into a small cup."
"The thermos kept the ice water cold even in the sweltering heat."
"I always carry a thermos of homemade soup when I go camping in the winter."