GU FLASK

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Built in partnership with Hydrapak, our custom soft-flasks are engineered for endurance athletes who demand convenience and performance. The 150 ml flask holds up to 5 servings of Energy Gel or 3 Liquid Energy Gels—perfect for quick fueling without the mess. The 500 ml option fits seamlessly into running vests and accommodates Roctane Energy Drink Mix or Hydration Tabs for on-the-go mixing. Both sizes feature a high-flow nozzle designed for fast, efficient sips when every second counts. Lightweight, durable, and purpose-built for your longest efforts. Show more