With many, many possibilities of all the things you can put in your safe, here are several things you definitely should NOT put in your safe.
Gasoline is a dangerous substance that should be kept away from children and stored safely. However, storing gas in a safe makes it even more dangerous. Although gas is a liquid when we get it out of the pump, it wants to be a gas. Due to its low flashpoint, it evaporates into fumes very quickly. With the smallest spark, those fumes can and will explode. Putting a gas can in your safe traps those fumes inside and invites the possibility of your safe blowing up from the inside and destroying everything else in there as well.
One of the most common chem...