Hollister m9 is a brand of odor eliminating products designed for ostomates and catheter users. There are several different types of odor eliminating products to choose from including drops, sprays, and pouch cleaners. The drops go into the ostomy bag prior to use and help reduce odor when you go to empty your bag. The sprays are meant to use in a room to eliminate odors in the air. This product can be used for a variety of biological odors that come from wounds, urine, and feces. The m9 cleaner helps deodorize urinary supplies and breaks down uric crystal buildup. By regularly cleaning your urinary supplies, you extend their lifespan and keep them performing at their best.