Abstract: A medication transfer connector and connection is described which allows dead-space reduction in the fluid path between a first and a second fluid transfer device. The reduction in dead-space does not depend on manufacturing dimensional tolerances of the transfer device's or connector's mating components. Thus, waste of medication due to dead-space is reduced without depending on control of manufacturing tolerances of the mating components' dimensions. Selection and interchange of the first and second fluid transfer devices are allowed.

Abstract: A vessel useful for the collection of body fluid samples includes a first elongate tube defining an axis. The first tube has an open end with an inside diameter and a closed end section with an outside diameter. The first tube includes a receptacle therein for receiving a fluid sample that is accessible from open end. The vessel includes a second elongate tubes substantially identical to the first tube. The closed end section outside diameter is less than the inside diameter of the open end. The first tube closed end section is conjugately disposed in the open end of the second tube so that the first tube and the second tube are substantially axially aligned thereby forming a single article.