Chemicals are not ordinary liquids you can store in whatever type of container you find nor can place them wherever there is free space. They are fluids with certain properties that react to various conditions and can alter the composition of whatever they get in touch with.
Some chemicals are even poisonous and can cause severe damage if not handled properly. That is why it is recommended to have them safely stored out of people’s reach in suitable chemical storage cabinets and to have specially trained personnel handling them when needed. After all, that is why chemistry is a separate science that only chemists are proficient at, right?