The Steel Flip Straw allows you to access fluids without unscrewing the cap or tilting the bottle. The patent-pending lid with Nathan's finger loop QuickClip attaches the bottle to a belt, shoulder strap, or pack strap with ease. The wide-mouth, screw-top lid is easy to grip and large enough for easy filling and cleaning. An excellent choice for consumers looking for a BPA-free bottle. Capacity: 0.7L / 23.7 ounces.