Whether you're seeking a replacement bottle for your Nathan Peak Insulated Waist Pak or simply need an insulated, easy-gripping bottle for distance runs and outdoor exercise, the Nathan SpeedDraw Insulated Flask 18oz Water Bottle keeps you pleasantly hydrated on the go. Featuring double-wall insulation, this 18-ounce water bottle keeps liquids from heating up during sweltering temperatures and long-duration exercise. Moreover, its hi-viz reflective exterior boosts visibility when you're running at dawn and dusk. Other key features include an easy-squeeze, ergonomic design for easy handling, as well as a Push-Pull cap for sipping convenience.