AirLife Modudose unit dose solutions contain sterile water and have twist-and-pull-off tops for easy opening. These unit dose solutions contain sterile water, normal saline (0.9% sodium chloride) or half-normal saline solution (0.45% sodium chloride) and have twist-and-pull-off tops for easy opening. The vials feature graduations in 0.5 mL increments and dispense by the drop, the milliliter or as a stream. Their tapered tip facilitates use with various tracheal suction systems.