Anaerobic Jars create an oxygen-free space for growing anaerobic bacteria on agar plates. Organisms such as Clostridium, Bacteroides and Prevotella cannot grow when oxygen is present. A gas-generating kit placed inside the jar removes oxygen and builds up carbon dioxide once the lid is sealed. An indicator shows whether any oxygen remains during incubation. A sturdy lid with secure clamps holds the atmosphere for the whole run. The anaerobic culture jar withstands repeated autoclaving. Jar volumes typically range from 0.5 L to over 10 L, sized to the number of Petri dishes. Typical users include clinical microbiology, pharmaceutical QC, food testing and anaerobic research labs.