Overview: 1. Easy to use a travel mug for your Dog. Fits in the standard car cup holder. 2. Holders up to 20 ounces (500ml) of freshwater. 3. The bowl has a special valve that never wastes water, so your pet can travel longer. 4. Easy to operate. 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.