A replacement cartridge for a safety razor includes a dispensing head and a reservoir for a flowable shaving aid material. A removable shield is between the reservoir and the dispensing head and the shield interrupts fluid communication between channels of the reservoir and the dispensing head when the shield is in place. Fluid communication is permitted when the shield is removed. Removal of the shield is a onetime event. The shield can be a thermoplastic film. A razor cartridge can be disposed adjacent the dispensing head and the housing of the razor cartridge can be integrally formed with the housing of the dispensing head.