Brand: HydraPak
Category: Running Water Bottles & Flasks
Recommended by Anne Hinman, Trail + Ultra Runner — Bozeman, MT
The UltraFlask™ Speed 500ml is a versatile and lightweight hydration solution designed for athletes and outdoor enthusiasts. Its innovative design ensures a secure fit in various packs while allowing for quick refills, making it an essential companion for any adventure. 1. Lightweight TPU material ensures durability without adding extra weight. 2. Wider form provides stability and easy handling during activities. 3. 3D welded bottom enhances structural integrity for long-lasting use. 4. SpeedFill™ Cap allows for rapid refills, minimizing downtime. 5. Compact design fits seamlessly into most running packs and vests. 6. Holds up to 500ml (17oz) of liquid, perfect for hydration on the go. 7. Soft and pliable construction enables easy packing and storage. The UltraFlask™ Speed 500ml is ideal for trail running, hiking, and other outdoor activities where hydration is crucial. It performs best in dynamic environments, such as rugged trails or during intense workouts, making it suitable for both novice and experienced athletes. Its compact size and lightweight design make it perfect for warm weather adventures or extended outings where every ounce counts.
Price: $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.
Anne Hinman's review
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.
Recommended by Anne Hinman, Trail + Ultra Runner
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 Anne Hinman say about the UltraFlask™ Speed 500ml?
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.
Why does Anne Hinman recommend HydraPak?
Anne Hinman recommends the HydraPak UltraFlask™ Speed 500ml for running water bottles & flasks. 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.
Is the UltraFlask™ Speed 500ml a good running water bottles & flask?
Yes — Anne Hinman recommends the UltraFlask™ Speed 500ml by HydraPak as their running water bottles & flasks pick. 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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What other hosts are saying
7 experts recommend the HydraPak UltraFlask™ Speed 500ml.
So many flasks, so much water!
Recommended in Cocodona 250
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!
Recommended in Fastpacking
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.
Recommended in Teton Crest in a Day
Best soft water bottles for carrying on the trails
Recommended in 10 Products I Actually Use
the best soft flasks in the game. aid station volunteers are blown away when i roll up with these bad boys
Recommended in Pinhoti 100!
Paired with the long straw
Recommended in Race day Essentials
