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Gear & Accessories Hydrapak™ Soft Flask 500 ml

Simpler, faster, and cleaner, this lightweight 500 ml collapsible Drink Mixes flask with a large opening allows for instant and durable nutrition on your most challenging adventures.

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Simply fill it with a Drink Mix, give it a squeeze, and you're prepared to conquer anything that comes your way.


  • Easy open cap to protect from dirt
  • Shrinks as you drink
  • Superior durability and elasticity
  • Wide working temperature range
  • Fill it easily with the 42 mm opening
  • Weight 41 grams
  • 186mm x 58mm
  • TPU, PP/POM, Silicone
  • 100% BPA+ PVC free
  • Color: white
    • Why you'll love it

      Soft nozzle: Wide opening silicone nozzle lets you fill easily, holds 1 Single Serve Drink Mix.

      Easy open cap: Protects the bite nozzle from dirt and debris.

      Durable softflask: Made of abrasion resistant TPU & RF welded seams for superior durability and elasticity

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

      When to use graph

      Add 2 scoops of Drink Mix to the Flask to get 250 calories.

      Used by ultra distance athletes

      All our products are developed hand in hand with elite athletes through the Näak Lab. Our mission is to build the most efficient and sustainable fuel for ultra distance sports. Today, thousands of professional and amateur athletes around the world depend on Näak to explore new playgrounds and redefine what is physically possible.

      Backed by Science

      Näak Ultra Energy™ science was developed to meet the specific needs of ultra distance athletes. The idea is simple: the ingestion of a few macronutrients such as carbohydrates and electrolytes is not enough to fuel ultra distances. After a few hours of effort, you need a complete nutrition approach to go farther.

      Commonly Asked Questions

      What is Näak’s mission?

      Our mission is to help endurance athletes unlock their full potential while preserving their playground.
      We’re doing so by building the most efficient and sustainable fuel for endurance athletes. It's all based on one radical idea. Long lasting energy powered by high quality and sustainable ingredients. Or, as we call it, Ultra Energy™.

      What does Näak stand for?

      Näak stands for Nutrition for Adventurous Athletes who run Kilometers.

      Where can you buy Näak products?

      In your local sport store: use our Store Locator to find where Näak products are sold near you. We recommend calling before you go to make sure they have the product you look for in stock.
      Online: You can buy Näak products on our website. We ship internationally.

      Share your Näak experience @naakbars and get a chance to be featured.

      Customer Reviews

      Based on 4 reviews
      Edouard B. (Montreal, CA)
      Bonne qualité et pratique

      La flasque a plus un profil en longueur, elle fit bien avec les vestes Salomon. La structure souple fait qu'on ne la sent pas du tout.

      Geneviève A. (Phoenix, US)
      Excellent produit

      Ces gourdes sont idéales pour l'entrainement. S'incère bien dans une veste d'hydratation ou une ceinture de taille. Lavage facile et remplissage facile pour un ravito rapide!

      Simon W. (Surprise, US)

      I love the flask!!!

      Brandon M. (Calgary, CA)
      Perfect for the Näak drink mixes!

      The soft flasks are great for training and racing, holding the Näak drink mixes in my running vest. Fantastic!

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