Airless Containers are cleverly designed bottles and dispensing systems that use environmental pressure to create a vacuum that dispenses product. This is a different sort of propulsion from an aerosol which requires a propellant added to a product. Airless Containers don’t require propellants, they are designed in such a way as to seek a natural pressure equilibrium based on a differential between external and internal environments. Consequently, the product is dispensed as it seeks to occupy free space outside of the container.