Dewar Flask

A Dewar Flask is a specialized container designed to keep liquids at a steady temperature, either hot or cold, with minimal heat transfer. It consists of two nested glass bottles, with a vacuum space in between, which prevents heat from passing through conduction or convection. The inner surface also has reflective coatings that reflect heat radiation. This design helps maintain the temperature of its contents for extended periods, making it useful for scientific experiments, storing medicines, or preserving food and beverages. In essence, it's an insulated flask that efficiently preserves temperature through advanced insulation techniques.