Hydrapak Ultraflask Speed Collapsible Flask Water Bottle - 600 ml - Malibu Blue
Hydrapak Ultraflask Speed Collapsible Flask Water Bottle - 600 ml - Malibu Blue
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HydraPak

Hydrapak Ultraflask Speed Collapsible Flask Water Bottle - 600 ml - Malibu Blue

Hydrapak Ultraflask Speed Collapsible Flask Water Bottle - 600 ml - Malibu BlueHydrapak Ultraflask Speed Collapsible Flask Water Bottle 600 ml Malibu BlueHydrapak Ultraflask Speed Collapsible Flask Water Bottle 500 ml Malibu Blue

Key item features

  • COMFORTABLE FIT

    Soft material conforms to most hydration vests, belts, or pack pockets

  • COMPRESSIBLE

    Flexible design shrinks as you drink reducing water movement

  • CUSTOMIZABLE HYDRATION

    Choose between a bite valve and a drink tube cap

  • SPEEDFILL CAP

    Topped with a flip top cap for fast refills at aid stations

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Customer ratings & reviews

4.4 out of 5 stars
stars137 ratings69 reviews
How item rating is calculated
  1. 5 stars78% (107)
  2. 4 stars8% (11)
  3. 3 stars3% (4)
  4. 2 stars4% (6)
  5. 1 star7% (9)

Reviews summary

Pros

  • : Designed for versatility in storage and carrying.
  • : Allows easy filling and compatibility.

Neutral

  • : Can be secure with a pronounced snap, but may add weight.
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Showing 1-3 of 69 reviews

Nov 1, 2025
HighnDry
5 out of 5 stars review

Seller Verified Purchase

Lightweight and easily accessible

Very light weight. Clean taste to drink from. Fits snuggly into a water bottle sleeves that I clip to my shoulder strap.on my pack. Perfect for long distance hikes and easily accessible for hydration

Review from HyrdraPak LLC
Helpful?5OJX2JMEI9SY459101716
Sep 28, 2025
Fast In The Forest
5 out of 5 stars review

Seller Verified Purchase

Fits Instinct Eklipse Vests

I have Instinct running vests, but the 650ml soft flasks they come with are not HydraPak compatible. Can't use my filters. These UltraFlask 600ml flasks are a perfect replacement for the flasks the Instinct vests ship with.

Review from HyrdraPak LLC
Helpful?5OJX2JMEI9SY459101716
Sep 23, 2025
Scottie
5 out of 5 stars review

Seller Verified Purchase

Fast fill flask

Great flask simple design that works. Fast fill feature makes filling a breeze although I do see where it could pop open in rare instances since it doesn't lock beyond a snap

Review from HyrdraPak LLC
Helpful?5OJX2JMEI9SY459101716