Unscrew the bone-shaped dispenser's end cap and fill with a new of Courtesy Waste Pick Up Bags as needed. Replace end cap by screwing in the opposite direction. Simply insert hand into bag collect your pet's waste from the ground and invert the bag inside out for easy disposal. new Easy to attach to Any Leash, Collar, Harness Compact Dispenser holds 20ct. Heavy Duty Courtesy Waste Bags Sanitary, disposable, Ease of Use 4 Roll of 20ct. heavy Duty bags:80 Refill Bags 100% Leakproof, Double-Sealed heavy Duty Construction Additional Details ------------------------------ Package quantity: 1