The Dooloop is made from recycled plastic. The inventor got into a situation where she fell. She had the poop bag in one hand and the leash in the other. She had to pick a hand to catch herself. She then came up with the Dooloop. The Dooloop connects to your leash. You hang the poop bag on the Dooloop. Now you dont have to carry poop in your hand all of the time. 

Dooloop Poop Bag Holder