thermos
ther-mos
noun
A vacuum flask, often a brand name, used for keeping drinks hot or cold.
"Don't forget your thermos for the picnic."
Thesaurus
Synonyms: thermos bottle, thermos flask
ther-mos
A vacuum flask, often a brand name, used for keeping drinks hot or cold.
"Don't forget your thermos for the picnic."
Synonyms: thermos bottle, thermos flask