thermos flask

/ˌθʌrməs flæsk/
IPA guide

Other forms: thermos flasks

Definitions of thermos flask
  1. noun
    vacuum flask that preserves temperature of hot or cold drinks
    synonyms: thermos, thermos bottle
    see moresee less
    type of:
    vacuum bottle, vacuum flask
    flask with double walls separated by vacuum; used to maintain substances at high or low temperatures
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