Nathan Stainless Steel 700ml Silicone Sleeve Flip Straw Bottle Stainless steel keeps fluids warm or cold for hours (not for use with hot beverages or milk products) Leak-proof cap and bottle Finger-loop with QuickClip for attaching to belts and backpacks Stainless steel will not rust and is dishwasher safe (top rack) Wide mouth screw-top lid is easy to grip, clean, and fill