Black Waste Pick-Up Dispenser and Refill Bags with Dookie Dock (3203910400) by Bags on Board . Bone Dispenser with 30 dog waste bags (2 rolls of 15 bags) makes picking up after your dog even more simple and convenient with Bags on Board new Dookie Dock! Dookie Dock is a hands-free poop bag holder that holds two dog waste bags, so you can always have a free hand. And, Bags on Board metal carabiner makes attaching to any leash (standard or retractable) even easier, so you'll always have poop bag when you need it. The Bone poop bag dispenser has a sturdy, compact design and holds 15 large dog poop bags. And, when it's time to refill, simply twist off the top and reload with a fresh roll of bags. Bags on Board bags have double-sealed seams to make them stronger and leak-proof guaranteed.