A coffee thermos is a container designed to keep beverages hot or cold for extended periods. Typically made from stainless steel or glass, these thermoses feature double-walled insulation that minimizes heat transfer. This design helps maintain the temperature of coffee, tea, or other drinks, making them ideal for travel, outdoor activities, or daily commutes. Many coffee thermoses come with a secure lid and a spout for easy pouring. Some models even include built-in cups or handles for convenience. Popular brands like Thermos and Contigo offer various sizes and styles to suit different preferences and needs.