Applied Nutrition Water Bottle for Fast and Accurate Mixing of Endurance Powders Endurance Portable Sports Bottles Are Designed for Endurance Sports, Its Wide-neck Sports Bottles Feature a Unique Easy Mix System and Wide Neck for the Effortless Dispensing and Mixing of Endurance Powder Supplements. The Size of the Bottle Holds Just Short of a Pint of Fluid and Its Standard Diameter Ensures It Fits Easily in Bicycle Water Bottle Cages. An Ergonomic Design Makes It Easy to Grab When You’re Continually Reaching for It to Take in Fluids During Endurance Exercise. Features Designed for Fast and Accurate Mixing of Endurance Powders. Portable Sports Bottles With Wide Necks for Easy Dispensing and Mixing of Endurance Powder Supplements. Holds Just Under a Pint of Fluid and Fits Perfectly in Bicycle Water Bottle Cages.