A vacuum flask, also known as a thermos flask or bottle, is a container designed to keep liquids hot or cold for an extended period. It consists of two layers of material with a vacuum in between to minimize heat transfer through conduction and convection.
The exterior of the vacuum flask is typically made of durable materials such as stainless steel or plastic, while the interior is usually made of glass or stainless steel. The cap of the flask can be either screw-on or push-button and is designed to be leak-proof and easy to open.
Vacuum flasks are available in a range of sizes, from small enough to fit in a pocket to large enough to hold multiple cups of liquid. They are often used for transporting hot or cold beverages, such as coffee, tea, or water, to work, school, or outdoor activities.
Overall, vacuum flasks are a convenient and practical solution for keeping liquids at their desired temperature for an extended period, making them a popular item for those on-the-go
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