Nicknamed Baby Gallon, after Baby Yodi, the Half Gallon is more versatile and lighter than our Flagship 1 Gallon. It’s the first 1/2 Gallon without having to tip over your head. Up to 36+ Hours Cold! Limited quany. While supplies last. Unlike ALL other Half-Gallon bottles, this is the first 1 cool water bottle gallon jug where you don’t need to tip it over your head to take a drink. Our Half Gallon uses two patent/patent pending state of the art insulated COLDEST caps that work together to create the perfect half gallon COLDEST water bottle.