Turn Over Extinguisher Concept by Jin Junho, Woo Seul A & Lyu Byung Chul. Do you know which many fire extinguishers need to be shaken about monthly basis to reduce the powder inside from hardening? Well, Turn over extinguisher project has been built to motivate users to regularly shake their extinguisher by taking your form of a sandglass. Some countries even have special days to shake extinguishers. By simply shaking these tools, it’ll help to keep all of them functional anytime you need them.