The dooloop is a patent-pending leash accessory to hold used poop bags when you're out on a walk. With one hand you simply slide bags on and off, your hands are free and your pockets empty.  

dooloops are made in Maine by Houndswag LLC and made of bio-degradable non-toxic plastic and use zero-waste packaging that includes a ball-chain to attach your dooloop to any leash handle.