• Upgrade the buckle design to the side, it is easier to control and keep the water in the collapsible bowl • Increase the depth of the bowl to further adapt to the dog's drinking habits • Make the bottle body slender and easy to hold • The capacity is increased to 21oz; the strap is upgraded, which can bear 44 pounds • The control of the water outlet switch button is upgraded to move the slider left and right, which is more humanized.