An anaerobic jar, also known as an anaerobic chamber or anaerobic environment container, is a specialized laboratory apparatus designed to create and maintain an oxygen-free environment for the cultivation and study of anaerobic microorganisms. This sealed container is typically made of transparent material, allowing for visual observation of the contents without compromising the anaerobic conditions. The anaerobic jar operates on a simple yet effective principle. It includes a gas-generating pack or a mixture of chemical substances that, when activated, release gases that replace the oxygen within the chamber with other gases like nitrogen and carbon dioxide. This displacement of oxygen effectively creates an anaerobic atmosphere.