Brand: HydraPak
Category: Running Water Bottles & Flasks
Recommended by Jeff Garmire, Athlete — Montana
The UltraFlask™ Speed 500ml is a versatile and lightweight hydration solution designed for active individuals. Its innovative design ensures a secure fit in your gear while providing quick access to hydration during your most demanding activities. 1. Made from lightweight TPU material, ensuring durability without adding bulk. 2. Features a wider form for enhanced stability and easy handling during use. 3. Equipped with a 3D welded bottom for added durability and a secure base. 4. Includes the SpeedFill™ Cap, allowing for rapid refills on-the-go. 5. Compact design that easily fits into most running packs and vest pockets. 6. Soft and pliable construction enables it to pack down for convenient storage. 7. Holds up to 500ml (17oz) of liquid, perfect for extended outdoor activities. The UltraFlask™ Speed 500ml is ideal for trail runners, hikers, and outdoor enthusiasts seeking a reliable hydration solution. It performs best in active environments, such as during races or long-distance training sessions. Designed for users of all skill levels, this flask excels in scenarios where quick access to water is essential, making it a must-have for summer adventures or high-intensity workouts.
Price: $17.6 - $22
- Who it's for
- Trail runners and ultramarathon athletes who carry water in vest pockets, especially those running long events or multi-day adventures. Works for both water and electrolyte drinks.
- What people are saying
- Hosts consistently praise the low-slosh feel, secure pocket fit, and easy refueling via the snap/Speedfill cap. One caveat: the Speedfill cap can come undone when stored inside a pack without a filter cap on.
- Worth noting
- Compatible with a long straw and filter-top caps, making it versatile for backcountry use with water filtration. The cap security issue is worth noting for anyone planning to store it loose inside a pack.
Jeff Garmire's review
So many flasks, so much water!
Recommended by Jeff Garmire, Athlete
Frequently asked questions
Who is the UltraFlask™ Speed 500ml for?
Trail runners and ultramarathon athletes who carry water in vest pockets, especially those running long events or multi-day adventures. Works for both water and electrolyte drinks.
What do experts say about the UltraFlask™ Speed 500ml?
Hosts consistently praise the low-slosh feel, secure pocket fit, and easy refueling via the snap/Speedfill cap. One caveat: the Speedfill cap can come undone when stored inside a pack without a filter cap on.
What should you know before buying the UltraFlask™ Speed 500ml?
Compatible with a long straw and filter-top caps, making it versatile for backcountry use with water filtration. The cap security issue is worth noting for anyone planning to store it loose inside a pack.
What does Jeff Garmire say about the UltraFlask™ Speed 500ml?
So many flasks, so much water!
Why does Jeff Garmire recommend HydraPak?
Jeff Garmire recommends the HydraPak UltraFlask™ Speed 500ml for running water bottles & flasks. So many flasks, so much water!
Is the UltraFlask™ Speed 500ml a good running water bottles & flask?
Yes — Jeff Garmire recommends the UltraFlask™ Speed 500ml by HydraPak as their running water bottles & flasks pick. So many flasks, so much water!
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What other hosts are saying
7 experts recommend the HydraPak UltraFlask™ Speed 500ml.
I usually put my filter top on this 500 ml soft flask. With good planning and a filter, I am usually fine with 1 L total water capacity on most of my trips (two 500ml soft flasks). One thing to be mindful of if you are not using the filter cap and are storing this in your pack is that the Speedfill cap can come undone!
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Ben Corwin, Hutkeeper and mountain adventurer
Easy to fill and designed to fit a wide variety of pockets, we use these flasks for water and electrolyte drinks alike on long runs. Generally carry two, both up front, but sometimes one is enough if it's not too hot as there is quite a bit of available water on the Leadville 100 course.
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Best soft water bottles for carrying on the trails
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I use these bottles for every run, race, and adventure! They limit the "slosh" feeling and don't bounce around. The snap bottle really helps with easy re-fueling.
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the best soft flasks in the game. aid station volunteers are blown away when i roll up with these bad boys
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Paired with the long straw
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