Nathan Pinnacle 18oz Insulated Soft Flask
Quick Specs
About the Nathan Pinnacle 18oz Insulated Soft Flask
Grip-free comfort. Chill hydration. No distractions.
The Nathan Pinnacle 18oz Insulated Soft Flask is built for endurance junkies who move fast and pack light. Whether you're chasing a new PR on the trails or powering through a marathon, this handheld delivers hydration without the hassle.
Featuring Nathan's signature Exo-Draw technology, it combines a minimalist, grip-free hand strap with a chill-boosting insulated flask to keep your fluids colder—longer. An expandable stash pocket holds keys or gels so you can focus on the miles ahead, not what's bouncing around in your hands.
Key Features:
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18oz / 535mL BPA-free insulated soft flask with bite valve
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ExoSpine™ design for structure and comfort
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Breathable, ergonomic mesh strap for grip-free carry
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Collapsible flask design shrinks as you sip
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Expandable stash pocket for keys, gels, or essentials
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Weighs just 3.35 oz (95 g) with flask
Ideal For:
Trail runners, marathoners, hikers, and anyone who wants to hydrate without slowing down.
Why We Love It:
It's light, low-profile, and smartly designed to feel like an extension of your hand—not a bottle you're lugging around.
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Questions about shopping with Coastal Run
Quick answers about shipping, returns, fittings, rewards, and more so you can shop with confidence.
How fast do you ship online orders
We pack and hand off most orders within one business day. Once the carrier has your package, delivery timing depends on the shipping option you choose at checkout and your location.
Can I return or exchange my shoes
Yes. If your item meets our return conditions, you can usually return or exchange it. Our goal is always to help you move into something that feels better on your feet.
Do you help with shoe fittings
Yes. In store, our team walks you through a full fit process, asking about your goals, any past injuries, and how you’ll use your shoes so we can recommend options that feel right for you.
What is Coastal Run Rewards
Coastal Run Rewards is our points program. You earn one point for every dollar you spend and can redeem points for money off future purchases. It’s a simple way to save on the gear you already need.
Can you help if I have wide feet or use orthotics
Yes. We carry options in wider fits and shoes that work well with custom or over-the-counter orthotics. Our team will help you find pairs with enough volume and support for your setup.
Where are your store locations
Coastal Run currently has locations in Easton, Maryland and Scarborough, Maine, along with an online store that serves many states. Each shop is locally run with a focus on comfort, fit, and community.