The Ohio State University 21oz FlexR Sports Bottle features an ergonomic shape and feel allowing comfort for miles upon miles. Very flexible and squeezable, fitting your hand comfortably enabling you to get your water or favorite mix while on the go. Air space between liner and bottle act as an insulator to keep fluids cooler longer. Patented one way jet stream valve for accurate and precise flow. Round shape for use in any standard bike cage or cup holder. Neoprene insulating sleeve keeps your drink cold. 21oz capacity. Officially Licensed Product.