vacuum bottle
Noun: A container, typically cylindrical, designed to maintain the temperature of its contents (either hot or cold) for an extended period. Its insulating properties are achieved through a construction of double walls with the air removed (a vacuum) between them, which drastically reduces heat transfer by conduction or convection.
A "vacuum bottle" is used to store and transport beverages or food while keeping them hot or cold. It is a common item for daily use, travel, picnics, and work lunches. - She filled her vacuum bottle with hot coffee before the long drive. - The construction workers brought their lunch in vacuum bottles to keep their soup warm. - Modern vacuum bottles are often made of stainless steel and are very durable.
- Technical/Scientific Context: The principle of the vacuum bottle is based on creating a near-vacuum between two walls to minimize heat transfer. This makes it a practical application of thermal insulation physics.
- The experiment required a vacuum bottle to store the liquid nitrogen safely.
- Thermos: This is a common proprietary brand name (Thermos®) that has become a generic term for a vacuum bottle.
- He packed a thermos of iced tea for the hike.
- Insulated flask/bottle: A more general term describing any bottle designed to maintain temperature, which may or may not use a vacuum.
- Dewar flask: The scientific name for the original vacuum flask design, often used in laboratories.
- Insulated bottle
- Vacuum flask
- Thermos (as a generic term)
- Uninsulated container
- Ordinary bottle
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flask with double walls separated by vacuum; used to maintain substances at high or low temperatures
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