The Polar BPA-Free Insulated bottle is a sports bottle that keeps cold liquids colder more than twice as long as conventional bottles. It features double wall construction with an insulating thermal layer in between that reflects the sun's heat away from the liquid inside. The screw-on, wide-mouth top fits ice cubes and makes cleaning easier. It's dishwasher safe and the valve is removable for better cleaning.24 oz capacity. Double wall construction with insulating thermal later. Screw-on, wide-mouth lid makes filling and cleaning easy. Fits standard bicycle water bottle cages. BPA free. Dishwasher safe. Removable valve for better cleaning. Wt. 5.3 oz. Made in USA.