A thermal mug is a type of insulated container designed to keep beverages hot or cold for extended periods. It typically features double-walled construction, which minimizes heat transfer, allowing drinks to maintain their temperature. Many thermal mugs are made from stainless steel or plastic and often come with a secure lid to prevent spills. These mugs are popular for both travel and daily use, making them ideal for coffee, tea, or cold drinks. Some models include additional features like built-in straws or handles for convenience. Thermal mugs are often reusable, promoting sustainability by reducing the need for disposable cups.