Its standard intergrated cup seals both the interior and exterior neck of the bottle. BPA Free, This simple but effective item is the heart and soul of keeping your purified water contained. : Camera & Photo, : AquaNation - Dew Cap Replacement, For reference, nice and snug, Replacement cap for most of 3 & 5 gallon snap top water bottles, The cap fits both glass and plastic 3 and 5 gallon bottles with a "crown" or "snap-on" top, Light blue cap easy to remove, outside dimension for the bottle opening would be 2. This 55mm crown or snap-on light blue cap is the industry standard cap for 3 and 5 gallon water bottles, Quality of 2, : Camera & Photo, sold exclusively by AquaNation LLC. 165 inches, : AquaNation - Dew Cap Replacement. It fits both plastic and glass water bottles. Quality of 2, made in USA, 75 inches Will not fit the screw on type of bottle. made in USA, If you currently have a snap cap for the bottle the outside dimension of that cap is about 2. Release tab on the outer edge makes removing the cap a breeze. The perfect solution to transporting water, BPA Free, Interior cup assures a seal between bottle & cap.