Brand: HydraPak
Category: Water Bottles & Flasks
Recommended by Meikael Beaudoin Rousseau, Professional Trail & Mountain Runner — Boulder, CO
The HydraPak UltraFlask Speed 500 ml Water Bottle is designed for athletes and outdoor enthusiasts seeking a lightweight, flexible hydration solution. Its innovative features ensure quick refills and reliable performance, making it an essential companion for any adventure. 1. Soft and pliable design allows for easy compression and storage when empty. 2. Wider form provides stability and prevents tipping during use. 3. Durable 3D welded bottom enhances structural integrity and longevity. 4. SpeedFill™ Cap enables rapid refills, minimizing downtime during activities. 5. Lightweight construction ensures minimal impact on your gear load. 6. BPA-free materials guarantee safe hydration without harmful chemicals. 7. Versatile design suitable for running, hiking, cycling, and other outdoor activities. The HydraPak UltraFlask Speed 500 ml Water Bottle is ideal for active individuals who require quick and efficient hydration during their pursuits. It excels in outdoor environments such as trails, parks, and sports fields, making it perfect for runners, hikers, and cyclists. Its compact and flexible nature allows for easy transport, whether in a backpack or hand-held. This water bottle is particularly useful in warm weather or during high-intensity activities, ensuring you stay hydrated without the bulk.
Price: $22
- Who it's for
- Trail runners and ultramarathon racers who carry water in vest pockets, especially those doing long efforts like 100-milers. Also suits backcountry users who pair soft flasks with a filter cap for lightweight water management.
- What people are saying
- Hosts consistently praise the minimal slosh, easy refilling, and vest-pocket fit; the snap/Speedfill cap gets specific credit for on-the-go drinking. One host recommends sizing up to the 600ml for longer mountain runs, suggesting 500ml can feel limiting.
- Worth noting
- The Speedfill cap can come undone when stored inside a pack without the filter top — worth monitoring. Works with filter caps for backcountry use.
Meikael Beaudoin Rousseau's review
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 by Meikael Beaudoin Rousseau, Professional Trail & Mountain Runner
Frequently asked questions
Who is the HydraPak UltraFlask Speed 500 ml Water Bottle - 17 fl. oz. Blue 500 Ml for?
Trail runners and ultramarathon racers who carry water in vest pockets, especially those doing long efforts like 100-milers. Also suits backcountry users who pair soft flasks with a filter cap for lightweight water management.
What do experts say about the HydraPak UltraFlask Speed 500 ml Water Bottle - 17 fl. oz. Blue 500 Ml?
Hosts consistently praise the minimal slosh, easy refilling, and vest-pocket fit; the snap/Speedfill cap gets specific credit for on-the-go drinking. One host recommends sizing up to the 600ml for longer mountain runs, suggesting 500ml can feel limiting.
What should you know before buying the HydraPak UltraFlask Speed 500 ml Water Bottle - 17 fl. oz. Blue 500 Ml?
The Speedfill cap can come undone when stored inside a pack without the filter top — worth monitoring. Works with filter caps for backcountry use.
What does Meikael Beaudoin Rousseau say about the HydraPak UltraFlask Speed 500 ml Water Bottle - 17 fl. oz. Blue 500 Ml?
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!
Why does Meikael Beaudoin Rousseau recommend HydraPak?
Meikael Beaudoin Rousseau recommends the HydraPak HydraPak UltraFlask Speed 500 ml Water Bottle - 17 fl. oz. Blue 500 Ml for water bottles & flasks. 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!
Is the HydraPak UltraFlask Speed 500 ml Water Bottle - 17 fl. oz. Blue 500 Ml a good water bottles & flask?
Yes — Meikael Beaudoin Rousseau recommends the HydraPak UltraFlask Speed 500 ml Water Bottle - 17 fl. oz. Blue 500 Ml by HydraPak as their water bottles & flasks pick. 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!
More from Meikael Beaudoin Rousseau's Fastpacking
View Meikael Beaudoin Rousseau's expert gear recommendations on Rendezvu
What other hosts are saying
8 experts recommend the HydraPak UltraFlask Speed 500 ml Water Bottle - 17 fl. oz. Blue 500 Ml.
So many flasks, so much water!
Recommended in Cocodona 250
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
I rec getting the 600ml for longer runs in the mountains
Recommended in Twisted Fork 68km
Best soft water bottles for carrying on the trails
Recommended in 10 Products I Actually Use
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 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
