The Igloo 1/2-Gallon Cooler is designed to keep up with you on the trail, in the gym or on the field. The Cool Riser Technology is Igloo's promise that you will never have another lukewarm liquid while you sweat, no matter the temperature outside. Rest assured that the durable design of Igloo's 1/2-Gallon Cooler means that it keeps your bottle safe from any accidental drops. The wide mouth opening makes it easy to chug or pour to share.