Aerosol cans are containers that hold liquids under pressure, allowing them to be sprayed in a fine mist or foam. They are commonly used for products like hairspray, deodorant, and cleaning supplies. The can is equipped with a nozzle that releases the contents when pressed, making it easy to apply the product evenly. Inside an aerosol can, a propellant, often a gas, helps push the liquid out when the nozzle is activated. This design ensures that the product can be used efficiently and effectively, minimizing waste. Proper disposal of empty aerosol cans is important for environmental safety.