Definition
A thermos flask is a container designed to maintain the temperature of its contents, whether hot or cold, for an extended period. It utilizes a double-walled construction with a vacuum between the walls to minimize heat transfer through conduction, convection, and radiation. Think of it as a portable, personal refrigerator or heater for your beverages! ☕❄️ Unlike regular flasks, a thermos ensures consistent temperature. It is commonly used for carrying coffee, tea, soup, or even chilled drinks on hikes or during travel. It's a great way to reduce waste from disposable cups and bottles.