Abstract: A connector apparatus for use with various types of disposable flexible foodstuff containers, such as polymeric bags containing soft drink syrups, of the type having a fitment attached to a wall of the container. The novel fitment includes a displaceable valve means having a seal plug member slidably received within a passageway and capable of being releasably retained at a pre-fill position and lockably retained at a post-fill position. A mating probe connector is permanently attached to the food product delivery hose system and includes an inner cap and sleeve comprising a probe adapter capable of being detachably secured to the novel fitment and a probe member for engaging the seal plug member. Product drain and positive evacuation structures are provided to assure substantially complete draining of product from the container during use. The probe is movable in response to rotation of a screw-threaded outer cap member.