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Contain liquids in portable vessels! Flasks are narrow-necked containers designed to carry beverages, from medieval leather flasks for wine to modern vacuum-insulated bottles keeping coffee hot for hours. These pocket-sized containers have accompanied travelers, soldiers, and workers throughout history—providing personal beverage service anywhere.
⚗️ Fun fact: The vacuum flask (thermos) was invented in 1892 and works so well because it eliminates heat transfer—keeping hot things hot and cold things cold for over 24 hours!
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