The Fire Hydrant & self filling water bowl combo is a fun way to keep your four legged family hydrated. A 2 liter bottle upside down inside the Fire Hydrant adds to the 1 liter of water the bowl already holds. Works like a regular water cooler, just smaller. Fill the bottle with water, put in the cuff, then slide the hydrant over the bottle, that simple! It comes in Red, Yellow, Green and Blue. Hand Crafted, unique and made in America.