These BPA-free replacement flasks feature Nathan's Race Cap™ that utilizes a high flow, one way valve that opens and closes automatically offering a quick shot of fluid to avoid interrupting breathing or affecting stride.
- BPA Free.
- The Race Cap™ is also compatible with all Nathan 5oz. and 10oz. Nutrition Flasks.
- Wide mouth for easy cleaning and filling.
- Dishwasher safe. (top rack)
- Measurement lines on back.
Hydration Boosts Endurance. The body can lose over 96 ounces of water per hour during sustained high-intensity activity. Continual hydration optimizes body cooling and energy transport, resulting in peak performance during training, competition and recreation.
Ditch Disposables: Using a refillable bottle, like this one, cuts down on the 38 billion disposable water bottles that clog landfills each year. This bottle is good for you and good for the environment.
Information on BPA and Nathan Bottles.