On the Fly - Nalgene's leak-proof loop-top swings open wide to reveal a contoured, high-flow drinking spout that's easy to fill at the fountain or sink.  One-handed push button for easy open/close; locking bail for ultimate insurance against leaks. Dishwasher safe.  24 oz. 

• Tough and impact resistant
• Leak proof
• Dishwasher safe and won't retain odors
• BPA free