Dispenser push button is exclusively protected by BioCote®, a silver-based antimicrobial agent that is incorporated into the plastic components at the time of manufacture and inhibits the growth of a broad spectrum of bacteria and molds. BioCote® will not wear-out or rub-off and is effective for the lifetime of the dispenser. The ultrasonically sealed cartridge and pump mechanisms prevent the ingress of air into the cartridge during use to help prevent product contamination and ensure 'fresh' product is dispensed every time.