Insulated containers are specially designed to maintain the temperature of their contents, whether hot or cold. They are commonly made from materials like stainless steel, plastic, or glass and often feature a vacuum seal that minimizes heat transfer. These containers are widely used for transporting food and beverages, making them popular for picnics, travel, and meal prep. The effectiveness of insulated containers is measured by their ability to keep items at a desired temperature for extended periods. Many people use them for coffee, soup, or ice cream, ensuring that their meals and drinks remain enjoyable, regardless of the outside temperature.