SoftFlask™ 250 ML


Whether it’s trails, rivers or slopes, nutrition is just a bite away. The collapsible, lightweight SoftFlask 250 is easy to fill and even easier to consume with our patented soft silicone bite valve. It can be integrated into a variety of packs, vests, belts, even PFDs. And since it holds 8.5 fl oz of your favorite nutrition concoction, you can go the distance without running out.


  • The SF250 flask fits easily in most hydration vest, belt or pack pockets
  • Soft material conforms to any pocket for a comfortable carrying experience
  • Designed to carry gels, water, electrolytes, or your own nutrition mix
  • High-flow bite valve auto-seals after each sip, eliminating annoying drips
  • Flask holds 8 servings of energy gel
  • Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity
  • Can be frozen or filled with hot water (max temp 60° C / 140° F)
  • Easy to clean 28mm cap; top-rack dishwasher safe
  • Safe and reliable, 100% BPA & PVC free


250 ml / 8.5 fl oz

23 g / 0.8 oz

222 mm / 8.7 in x 71 mm / 2.8 in

Thermoplastic Polyurethane; Silicone; HDPE

Frequently Asked Questions

How do I clean a SoftFlask?

All of our SoftFlasks are top-shelf dishwasher safe so they are very simple to keep clean. If you are fueling with energy gels or mixing your own nutrition mix, we recommend using a bottle brush or Bottle Bright to clean out any residue. The bite valves and tubes can easily be removed for cleaning as well. Our Cleaning Kit provides you with both a tube brush and tablet of bottle bright to soak your valves in.

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Customer Reviews

By CygnusAloft

Light and perfect

Great for my maple syrup on my long runs. Bite valve is perfect, doesn't leak and is lightweight. I can roll the whole thing up and stash it in my pocket.

By Bobbit

So perfect

Soft flask is awesome. Conforms to waste and belt. You can get every last drop out, then you can roll it up and stash it in a pocket.
Bite valve is perfect.
Easy to wash

By greg

great bottle

Awesome for putting in backpack pocket. Very convenient and nice that it collapses to a small size

By Jake

Convenient and durable

Lightweight for using in my running vest – I barely notice it in my pack. Great bottle for when I trail run and road run and I take it hiking too. Durable and easy to fold up when you're done.

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