Systems and methods for injecting a fluid into a system are disclosed. The systems include a capillary tube having an inlet and an exit. The capillary tube being configured to release the fluid from a bladder when there exists a pressure difference between the inlet of the capillary tube and the exit of the capillary tube. The pressure difference being caused by a redirection attachment. The methods include causing a pressure differential within a first container. The pressure differential applies pressure to a bladder forcing the fluid to flow from the bladder through a capillary tube.