Thermal mugs are insulated containers designed to keep beverages hot or cold for extended periods. They typically feature double-walled construction, which minimizes heat transfer, allowing drinks to maintain their temperature longer. 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. Brands like Contigo and Thermos are well-known for producing high-quality thermal mugs.