We upgraded the popular dog water bottle by adding a poop bag holder on the bottom. The bag roll can be put on the holder and pull out from the hole at the bottom of the bottle. The holder is made of ABS and strong enough to hang the bag roll. The bottle is made from food-grade ABS and PC. It is leak-proof and you can use it with one hand. The dog water bottle with poop bag is enough for walking with your lovely pet friends.