This is one of the first ever vacuum flasks. While we generally use them to keep our drinks hot, vacuum flasks were invented by James Dewar in 1892 to keep things very cold. Dewar was interested ...
WKBN Youngstown on MSN7mon
History of the Thermos bottleAn Oxford University scientist named Sir James Dewar invented it in 1892, one glass bottle inside another glass bottle with ...
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