The history of vacuum flasks can be traced back to the end of the 19th century. In 1892, Scottish physicist and chemist Sir James Dewar invented the first vacuum flask. Its original purpose was as a container for storing and transporting liquefied gases such as liquid oxygen. The thermos consists of two glass walls separated by a vacuum space. This vacuum acts as an insulator, preventing heat transfer between the contents of the flask and the surrounding environment. The invention of the Dewar proved to be very effective in maintaining the temperature of stored liquids. In 1904, the Thermos company was established in the United States, and the “Thermos” brand became synonymous with thermos bottles. The company’s founder, William Walker, recognized the potential of the Dewar’s invention and adapted it for everyday use. He added silver-plated inner linings to the double glass flasks, further improving the insulation. With the popularity of thermos bottles, people have made progress in enhancing their functions. In the 1960s, glass was replaced by more durable materials such as stainless steel and plastic, making thermos bottles stronger and more suitable for outdoor activities. Additionally, features such as screw caps, pour spouts and handles have been introduced for added convenience and usability. Over the years, thermoses have become a widely used accessory for keeping beverages hot or cold. Its insulation technology has been applied to various other products, such as travel mugs and food containers. Today, thermos bottles come in a variety of styles, sizes and materials to suit different needs and preferences.
Post time: Aug-21-2023