Infection Control Urinary Drainage Bag with Anti-Reflux Chamber, 2,000 mLBD's Urine Drainage bags feature a rounded, teardrop shape that ensures more efficient drainage.Bacterio-static and drainage bags not made with natural rubber latex are also available. The bacterio-static collection bag is impregnated with a novel antimicrobial agent that resists pathogens commonly associated with CAUTIs.