Apparatus for transferring liquids into and out of a vial having a septum, comprising: a barrel having a bore with an elliptical cross section having a major axis and a minor axis, an open end, and a closed end, the closed end forming a port through which fluids flow; a plunger comprising: an elongated shaft having an axis; a first end, a first disk-shaped member forming a flat second end thereof, and an external surface between the first end and the first disk-shaped member; and having a first bore along the axis opening through both the first end and through the second end of said elongated shaft; the flat second end having a cylindrical stub thereon having a second axis collinear with the axis of said elongated shaft, and a second bore along the second axis in fluid communication with the first bore, the cylindrical stub having an outer surface and a longitudinal channel therein between the second bore and the outer surface thereof; wherein the second bore within the shaft opens through the first end at a first hole and through the second end at a second hole which opens into a slot in the stub; a flexible stopper having an elliptical cross section adapted to slidably move within the bore of said barrel without rotating therein, and to provide a fluid seal therewith; a first end and a second end, a cylindrical-shaped interior portion opening to the first end and adapted to rotatably receive the first disk-shaped member; a recess adjacent to the cylindrical-shaped interior portion having an interior surface adapted to rotatably receive the cylindrical stub and to provide a fluid seal therewith; and a third bore passing between the interior surface of the recess through the second end of said stopper, such that when said elongated shaft is rotated to a chosen position, the third bore is in fluid contact with the longitudinal channel of the stub, and through the channel to the second bore; and a dispensing member having a septum-piercing spike at one end thereof with a fourth bore and a fifth bore exiting the spike, the fourth bore passing through said dispensing member and exiting a second end thereof, said dispensing member being attached to or integrally formed with the first end of said elongated shaft such that the fourth bore is in fluid communication with the first bore, the fifth bore entering said dispensing member and exiting through an exterior face thereof, forming thereby a pressure relief port. a barrel having a bore with an elliptical cross section having a major axis and a minor axis, an open end, and a closed end, the closed end forming a port through which fluids flow; a plunger comprising: an elongated shaft having an axis; a first end, a first disk-shaped member forming a flat second end thereof, and an external surface between the first end and the first disk-shaped member; and having a first bore along the axis opening through both the first end and through the second end of said elongated shaft; the flat second end having a cylindrical stub thereon having a second axis collinear with the axis of said elongated shaft, and a second bore along the second axis in fluid communication with the first bore, the cylindrical stub having an outer surface and a longitudinal channel therein between the second bore and the outer surface thereof; wherein the second bore within the shaft opens through the first end at a first hole and through the second end at a second hole which opens into a slot in the stub; an elongated shaft having an axis; a first end, a first disk-shaped member forming a flat second end thereof, and an external surface between the first end and the first disk-shaped member; and having a first bore along the axis opening through both the first end and through the second end of said elongated shaft; the flat second end having a cylindrical stub thereon having a second axis collinear with the axis of said elongated shaft, and a second bore along the second axis in fluid communication with the first bore, the cylindrical stub having an outer surface and a longitudinal channel therein between the second bore and the outer surface thereof; wherein the second bore within the shaft opens through the first end at a first hole and through the second end at a second hole which opens into a slot in the stub; a flexible stopper having an elliptical cross section adapted to slidably move within the bore of said barrel without rotating therein, and to provide a fluid seal therewith; a first end and a second end, a cylindrical-shaped interior portion opening to the first end and adapted to rotatably receive the first disk-shaped member; a recess adjacent to the cylindrical-shaped interior portion having an interior surface adapted to rotatably receive the cylindrical stub and to provide a fluid seal therewith; and a third bore passing between the interior surface of the recess through the second end of said stopper, such that when said elongated shaft is rotated to a chosen position, the third bore is in fluid contact with the longitudinal channel of the stub, and through the channel to the second bore; and a dispensing member having a septum-piercing spike at one end thereof with a fourth bore and a fifth bore exiting the spike, the fourth bore passing through said dispensing member and exiting a second end thereof, said dispensing member being attached to or integrally formed with the first end of said elongated shaft such that the fourth bore is in fluid communication with the first bore, the fifth bore entering said dispensing member and exiting through an exterior face thereof, forming thereby a pressure relief port.