This dog water dispenser is designed with Silica gel seal ring, make sure the water doesn’t leak in your bag. Unused water can go back into the container easily by pressing the water key. Enough capacity 18.5 oz .We also have the same design with 12 oz and compact water bottle design is great for your pet dog or cat when outdoor walking, running, hiking, travelling or playing, etc. You can put it into backpack or hang on your hand with sling rope, Very easy to carry to anywhere you want. Bring this water cup and enjoy a walk or travel with your beloved dog. A great ideal gift toy for puppy medium large dog.