vacuum bottle

English Thesaurus

1. flask with double walls separated by vacuum; used to maintain substances at high or low temperatures (noun.artifact)

hypernym	:	flask,
definition	:	bottle that has a narrow neck (noun.artifact)

hyponym	:	dewar, dewar flask,
definition	:	vacuum flask that holds liquid air or helium for scientific experiments (noun.artifact)

hyponym	:	thermos, thermos bottle, thermos flask,
definition	:	vacuum flask that preserves temperature of hot or cold drinks (noun.artifact)