Abstract: A design of fuel and gas storage tank which prevents explosion in case of accidental damage occurs to the tank and even if the tank caught fire. Design consists of only mechanical attributes but not any other method or process. Adding small volume-less cubical structures (cells) within the tank, establish a physical barriers to prevent explosion. Explosion is a very rapid fuel burning or chain reaction. This design physically slows down the chain reaction while occupying very low volume, and allowing free flow of the fluids inside the tank during normal operations. This design is intended to minimize life lost and damages due to explosion and fuel spills during accidents even if the fuel caught fire. Prevention of explosion during fire provides more time to escape or rescue, and increases the chance of survival. Applications include but not limited to airplanes, utility cars, race cars and boats, fuel tankers, fuel storage tanks and containers.