The only one handed dog hydration system. Squeeze and water is delivered in the bowl. Fresh water for your dog prevent health issues from public water bowls. The bowl has a special valve that never wastes water. Squeeze the bottle to allow the water to come up to the bowl then release to allow the water to go back into the bottle. Never wasting a drop of water so your pet can travel longer. Holds 20 oz. Almost 100% leak tight Easily fits in car holder Squeeze and operate with one hand Release the squeeze and the extra water drains back into the mug