consisting of 3 parts: container - pump head - piston
no riser pipe like with conventional atomizers
the filling material removed by the pumping process is sucked upwards through the piston
no ingress of air ("airless"), and therefore no ingress of bacteria and mold spores
The pumping process also removes the air contained in the dispenser
No oxidation with the filling material
There is a plastic bellows in the head part of the dispenser, Pumping creates a negative pressure
-> Filling material is sucked out of the container
-> A membrane made of soft plastic serves as a valve
-> completely empty