Abstract: A vented needle comprises a distal end configured to pierce a seal of a first container having a top and a bottom surface and a seal of a second container having a top and a bottom surface. An interior lumen is configured to fluidly couple the first container and a fluid transfer device and the second container and the fluid transfer device. A middle portion is configured to engage the seals of the first container and the second container and having one or more axially extending vents. At least one of the one or more vents is configured to extend axially past the top and bottom surfaces of the seal of the first container and configured to fluidly couple the first container and ambient air outside the first container. None of the one or more vents are configured to extend axially past top and bottom surfaces of the seal of the second container.