CareFusion AirLife™ IPPB Manifolds with 360° Baffled Nebulizer, for Small Particle Size Our AirLife™ aerosol drainage units collect moisture accumulating from continuous in-line aerosol therapy. Composed of durable vinyl, the bags attach to a trach tee or a patient "Y". The drainage bags with 2L capacity have a hanger and a bottom drainage port. Some units also include a one-way safety valve that allows patients to breathe room air if the system occludes.