*Size: 19oz (550ml) *Product Details: Mr. Pen Portable Water Bottle Dispenser for Dogs. Foldable, Lightweight & Compact Size. Contains One Key to Open/Lock. Slide Right to Open. Slide Left to Lock. 1 Main Water Button Dispenser. Press Button to Fill Water. Release Button to Pause Water. Designed w/ Silica Gel Seal Ring preventing Water Leakage. Contains a Large Trough. Can store 19 oz of water. Also Includes Hand Rope/Carry Strap for Easy Access. *Pre-Owned. Never Used. Original Box/Packaging Included.