A fluid ejection device is disclosed that includes a body defining an interior bore, a fluid reservoir, and a fluid ejection chip. The fluid reservoir includes a wall and one or more fluid control surfaces disposed along an interior surface of the wall. The fluid reservoir defines an interior passage in fluid communication with the interior bore of the body. The fluid ejection chip is disposed on the body and comprises one or more fluid ejection actuators. The fluid ejection chip has one or more interior fluid paths in fluid communication with the interior bore of the body so that the fluid ejection chip ejects the fluid upon activation of the one or more fluid ejection actuators. The interior passage of the fluid reservoir, the interior bore of the body, and the one or more interior fluid paths are axially aligned such that the fluid is gravity fed to the fluid ejection chip upon entry into the interior passage of the fluid reservoir. The one or more fluid control surfaces are disposed along the interior passage of the fluid reservoir so that the fluid adheres to the one or more fluid control surfaces.