Everyone has used an aerosol can, but do you know how the fluid comes out? The most common method is using 2 types of fluids in the tank – one is stored under high pressure and another one is used to push the second fluid. Cans are usually made of a strong metal which can hold the high-pressure liquid/gas stored inside it. There is also a narrow tube running through the inside of the container. The tube is attached to a nozzle which must be pressed in order to ‘open the exit’ When the nozzle is pressed, the gas tries to escape, but since the liquid is in the way, it gets our first. The contents of the container can come out in any form – foam, liquid, gas, etc.