average rating 4.9 out of 5
Based on 106 reviews
  • 5 Stars
    99 Reviews
  • 4 Stars
    6 Reviews
  • 3 Stars
    1 Review
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
97% of reviewers would recommend this product to a friend
Times Used
Rated 3 out of 5
Quality
Rated 4 out of 5
Function
Rated 4 out of 5
Customer photos and videos
106 Reviews
Reviewed by Roden
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

First 10K test run, AMAZING

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Reviewed by AARON N.
Verified Buyer
I recommend this product
Product Standouts
  • Easy to Wash
  • Easy Access
I use it for
  • Ultrarunning
  • Trail Running
  • Road Running
Rated 5 out of 5
Review posted

Perfect Fit

Bought these as a replacement for something I already had, just needed the slightest bit more fluid capacity. 20 oz is the ideal size, and I love the wide-mouth opening for filling it with powders. Bought (2), so I had enough for a race without having to carry a large bladder. Awesome soft flask!

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Times Used
Rated 3 out of 5
Quality
Rated 5 out of 5
Function
Rated 5 out of 5
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Reviewed by Edward D.
Verified Buyer
I recommend this product
Product Standouts
  • Easy to Wash
  • Easy Access
  • High Quality
I use it for
  • Trail Running
  • Road Running
Rated 4 out of 5
Review posted

It works

It took a couple runs to get used to it. Now I can use it with no problems.

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Times Used
Rated 5 out of 5
Quality
Rated 5 out of 5
Function
Rated 4 out of 5
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Reviewed by Edward
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

It took a couple of runs to appreciate the design, and now I use it consistently.

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Reviewed by Reed P.
Verified Buyer
I recommend this product
Product Standouts
  • No Bounce
  • Compact
  • Easy Access
I use it for
  • Ultrarunning
  • Triathlon
  • Road Running
  • Trail Running
Rated 5 out of 5
Review posted

Pretty Awesome

I've never used an ultraflask before, but purchased two to go with a new OM Gear Vest Pro. Things I love: 1) they collapse as I drink from them, which really minimizes the amount of air coming through the line; 2) they never leave the vest, so I don't have waste time/thought/energy fumbling with them; and 3) they're extremely light weight. One reviewer said the nozzles hit them in the face, but that's easily fixed by tucking the nozzle into the loop on the shoulder strap of the gear vest. Problem solved. The ultraflask is just a really well-designed product. I use Maurten drink mix for my hydration/fuel, and I especially appreciate that the ultraflask is meant to hold 500 mL. It would be great if OM could print a 500 mL fill line on the ultraflask, but I'm smart enough to work around that.

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Times Used
Rated 5 out of 5
Quality
Rated 5 out of 5
Function
Rated 5 out of 5
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