The Original PupCup® is the dog bowl that lives on the bottom of your water bottle so you always have a simple and convenient way to give your hound clean, fresh drinking water without contaminating your own. It fits on Nalgene®, Hydroflask®, Kleen Kanteen®, Coleman®, Thermos®, and many others including most of the disposable bottles you buy at the convenience store (even the square ones!). If you have water, your hound has water. Guaranteed forever. BPA and latex free. Made in the U.S.A.