An open ended cylindrical connector device includes a) an internally smooth-bored first docking port at one end; b) an internally screw threaded second docking port at the other end; and c) a unidirectional hole-cutter/membrane-piercing arrangement deployed across the diameter of the cylindrical device with its cutting/piercing edges occupying the first docking port. The product is transferred from a sealed donating container to a receiving container by screwing the receiving container into the second docking port and subsequently pressing a sealed donating container into the first docking port. The seal on the donating container is punctured by the hole-cutter and releases the product for transfer through the cylindrical connector to the receiving container. The donating container docking port may be closed with a removable cap and the cylindrical connector used as a donating container screw cap.