Laboratory tests: very high resistance to perforation.Innovative process.

Puncture resistance

Easy maintenance

Ergonomic bite valve for good flow rate and the easy addition of isotonic drinks

Easy hydration

Intuitive design for a cap that is easy to open and close.

Easy opening/closing

Flexible flask that fits easily in the pockets of a trail running bag

Flexibility

Easy to hold and with an ergonomic on/off top.

Ergonomic grip

This 500 mL (1/2 qt) flexible flask is designed for comfortably transporting your drinks during your trail runs.

Volume (ml)

Skill Level

Frequency

Volume

isothermal

Cap Type

Main Material

Our design team's aim is to offer you flexible containers for you to use while you run. 
Compared with a rigid water bottle, this one is lighter, less noisy, and less cumbersome while you run.
When you run, the water bottle won't create any pressure points on your body.

A flexible flask making your trail runs more comfortable.

To prevent residual plastic taste, rinse your flask in clean water 3 times before each use. Then, dry it upside down without the mouthpiece. 
You can remove the mouthpiece to clean it. This is especially important if you are filling the bottle with sugary drinks!
Finally, to avoid any noise while running, remember to remove air by sucking out the air bubbles.This water bottle is born from an innovative process involving odourless, neutral-tasting plastic.

How to maintain your flask?

We listened to your feedback and improved the opening system of the water bottle. That's why the top is wider: to make it easier to clean the water bottle. 
The extra wide opening is also designed to make it easier to add isotonic drinks in powder or tablet form. 
We have also improved the look and feel of the cap for ergonomic opening and closing. The top of the water bottle is equipped with a rotating ridge to open or close it.

New and improved ergonomic cap

With its 500 mL (1/2 qt) capacity, your flexible flask is useful for about one hour of running time, on average.
To simplify your preparation and equipment, your 500 mL (1/2 qt) flask is compatible with all our trail running bags and belts!

What is the flask's running time and what is it compatible with?

The mouthpiece of the flask has an on/off position. In the off position, you can avoid any nasty surprises during transportation. In the on position, your flask will not leak while you are running: Pinch the mouthpiece and suck to drink.
Finally, the flask is designed so that you can drink without removing it from the front pocket of your bag.Please note that it's important to empty the air from the water bottle before you start running to avoid any nasty surprises...

Advice on hydrating properly

In order to guarantee the high standard of the 500 mL (1/2 qt) water bottle, our design team asked 12 runners to use it and comment on the flow of the bite valve, the on/off opening/closing system and, how easy it was to put the water bottle in the pocket of their bags. Using the feedback provided by our testers, we designed a product optimized for trail running.

Sports/

Running & Walking/

Running Accessories/

Running Hydration Vests & Water Belts/

kiprun

500 ml Flexible Trail Running Flask / Bottle