This Water Bottle Will Hold 18.5 Oz Of Liquid, And Has A Screw-off Cap With A Plastic Shield Inside. The Shield Will Help To Hold In Ice Cubes As You Drink. The Outside Cap Is Attached To A Nylon Tether, So You Won’t Ever Lose It, And Also Attached To The Tether Is A Snap Link That You Can Attach To Your Belt Or Backpack.