It's nearly universal: if you own a dog, odds are you walk it using some sort of retractable leash, and need to scoop up its droppings after it's done doing its business. Ruff Bowl is designed for exactly these situations. It clips easily onto most large retractable leashes, holds used poop bags away from your hand, and can hold up to 4.5 oz. of water when it's time for Fido to take a drink.