Aw Wide Mouth Dog 1/2 Gal(64 Oz). A Wider Cap Size Set At A 45 Degree Angle And A 1/2 Inch Wide Stainless Steel Tip Opening Causes Less Restriction To Water Flow And Provides Outstanding Water Availiability Even On The Hotest Days. A Heavy Duty, Light Resistant, Semi-Opaque Plastic Along With The Standard No Leak Design And One Piece Tube/Cap Assembly Makes For Superior Performance. Ideal For Even The Largest Canines.