Diagram of COUPP Bubblechamber (IMAGE) DOE/Fermi National Accelerator Laboratory Caption COUPP uses a glass jar filled with about a liter of iodotrifluoromethane, a fire-extinguishing liquid also known as CF3I. Credit COUPP collaboration Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.