thermos
noun
ther·mos ˈthər-məs 
: a container (such as a bottle or jar) with a vacuum between an inner and outer wall used to keep material and especially liquids either hot or cold for considerable periods
Example Sentences
Recent Examples on the Web The iconic thermos has a handle, a cap that functions as a mug, and some of the best vacuum insulation on the market. 
Mark Stock, Men's Health, 24 Aug. 2022 In a half-gallon thermos, combine Lillet, tonic water, citrus juice, and Campari. Sarah Karnasiewicz, WSJ, 1 Sep. 2022 This bento box–style lunch box from OmieBox is insulated and comes with a removable, thermos-like container that works for hot and cold foods. Jessica Hartshorn, Good Housekeeping, 25 July 2022 Finally, add the bourbon and pour everything into your thermos. Outside Online, 17 Dec. 2020 Ditto with towing, moving grandfather clocks, and sitting on the tailgate and drinking a thermos of coffee while wearing a hard hat. Ezra Dyer, Car and Driver, 27 May 2022 Maroney said, as King poured restorative hot toddies from a thermos. Ben Mcgrath, The New Yorker, 28 Mar. 2022 Like the travel mug, Zojirushi’s food thermos is wonderfully uncomplicated. Esra Erol, Bon Appétit, 1 Mar. 2022 But what'd be even cooler is an insulated coffee thermos. Editors Of Men's Health, Men's Health, 4 May 2022 See More
Mark Stock, Men's Health, 24 Aug. 2022 In a half-gallon thermos, combine Lillet, tonic water, citrus juice, and Campari. Sarah Karnasiewicz, WSJ, 1 Sep. 2022 This bento box–style lunch box from OmieBox is insulated and comes with a removable, thermos-like container that works for hot and cold foods. Jessica Hartshorn, Good Housekeeping, 25 July 2022 Finally, add the bourbon and pour everything into your thermos. Outside Online, 17 Dec. 2020 Ditto with towing, moving grandfather clocks, and sitting on the tailgate and drinking a thermos of coffee while wearing a hard hat. Ezra Dyer, Car and Driver, 27 May 2022 Maroney said, as King poured restorative hot toddies from a thermos. Ben Mcgrath, The New Yorker, 28 Mar. 2022 Like the travel mug, Zojirushi’s food thermos is wonderfully uncomplicated. Esra Erol, Bon Appétit, 1 Mar. 2022 But what'd be even cooler is an insulated coffee thermos. Editors Of Men's Health, Men's Health, 4 May 2022 See More Word History
Etymology
from Thermos, a trademark
First Known Use
1907, in the meaning defined above
Kids Definition
thermos
noun
ther·mos ˈthər-məs
: a container (as a bottle or jar) that has a vacuum between an inner and an outer wall and is used to keep liquids hot or cold for several hours