A blood transfer device (400) adapted to receive a blood sample, comprising a housing (404) having a first end, a second end, and an actuation member (432) transitionable between a first position and a second position； an open cell foam material (406) disposed within the housing and having a dry anticoagulant powder therein； a first capillary tube (408) in fluid communication with the open cell foam material, the first capillary tube disposed between the first end of the housing and the open cell foam material； and a second capillary tube (414) in fluid communication with the open cell foam material, the second capillary tube disposed between the second end of the housing and the open cell foam material.
