The Difrax microwave sterilizer kills harmful bacteria on baby items within minutes. The microwave sterilizer has room for four S-baby bottles, teats, pacifiers, breast pump parts and accessories. Includes a connection to sterilize the breast milk hose from the Difrax Breast Pump. Tip: The inner rack of the microwave sterilizer can also be used as a draining rack, which means the S-bottles do not need to be dried.