This is a set of two yellow etiquette caps for dogs, perfect for walks. They can be attached to empty plastic bottles. I used to use a one-touch cap on a plastic bottle, but the opening was too large and the water came out too quickly, making it difficult to use. These caps spray the water like a shower, making it comfortable to use. It comes with a strap hook. Dog Shower Bottle Cap Set of 2 Yellow #DogUrine #DogWalk #DogEtiquette #GoingOutEtiquetteCap #WalkEtiquetteCap