Aseptic package tap

A tap for aseptic packages of the type which contain solutions and, in particular, solutions for medical applications. The type has a body (10), a packaging penetrating tip (13) extending from the body, a liquid passageway (22) extending from the tip and through the body for dispensing liquid from the package and a fluid passageway (31) extending from the tip and through the body for admitting make-up air to the package interior. A cylindrical member (12) of resilient material is positioned between the tap body and its penetrating tip and is insertable through the package wall in trailing relation to the tip. The resilient member is selectively compressed along its cylindrical axis to expand within the package and engage the wall to seal the orifice formed by the tip on penetration of the package wall and to secure the tap to the package.