A thermos is a container that can keep both hot and cold liquids at their desired temperature for extended periods using a vacuum layer between two layers of glass or plastic.
A thermos, also known as a vacuum flask, is a container designed to keep liquids hot or cold for extended periods. It consists of two layers of glass or plastic with a vacuum between them, which helps to prevent heat transfer. The inner layer is usually coated with a reflective material to enhance insulation. The cap of the thermos is typically made of plastic and has a tight seal to prevent air from entering or escaping.
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