Product Colors and Sizes

Special product, Innovation Special product, New Release Special product, Special product, Sale

500 ml Flexible Trail Running Water Bottle

Sale price: $12.99 Regular price:
Color: Select a color
Size: Select a size
Sale price: $12.99 Regular price:

Free returns

Free shipping over $30

Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8487344

Product Features

A photo of the 500 ml Flexible Trail Running Water Bottle in use

500 ml Flexible Trail Running Water Bottle is designed for trail runners seeking a user-friendly hydration solution when trail running.

Make yourself comfortable during your trail runs. Thanks to its flexible shape, your 500 ml flask is easy to carry in hand and can be easily stowed away in your bag or trail running jacket.

Compact design

Save space thanks to the flexible and compressible material of your flask.


Easily remove the air inside so the flask remains silent while you run


Run and feel light: your flask weighs only 1.2 oz when empty.

Easy to use

Rotating mouthpiece system makes it easy to drink

Mouth comfort

Run comfortably with the accessible silicone bite valve for mouth comfort.

Product Lifestyle Image Gallery

Image Gallery

500 ml Flexible Trail Running Water Bottle,blue 

500 ml Flexible Trail Running Water Bottle,blue 

500 ml Flexible Trail Running Water Bottle,blue 

500 ml Flexible Trail Running Water Bottle,blue 

500 ml Flexible Trail Running Water Bottle,blue

Product Customer Reviews

Skip to reviews
1439 Reviews
Write a Review 

500 ml Flexible Trail Running Water Bottle,blue
Filtered by reviews Loading reviews…

ใช้เวลาวิ่งสั้นๆ มันรู้สึกดีกว่าถือขวดน้ำปกติเพราะสามารถดื่มได้ง่ายขณะวิ่ง ถือเหมาะมือ และเวลาน้ำหมดลงเรื่อยๆซิลิโคนจะอ่อนลงและเล็กลงเรื่อยๆจนพับเก็บได้

สวัสดีครับคุณ Chetthaphon





Decathlon Thailand OMNI TRAIL Running Sport Leader

Thailand Kalenji Products Trainer

Very good

Used these for a year now. Ideal size for kalenji running pack, 2 bottles give you 2 hours hydration. no leaks and (with high ride height of Kalenji bag) relatively easy to use without removing from bag pocket. One thing though, twisting the bite valve open with teeth means likely to bite through the soft bite valve. Would be useful if there were replacement valves, as there is for the bladder range.

Pretty good

Bought two of these for my Kalenji trail rucksack and they are good. Easy to drink from without taking out of the bag but one of them seemed to leak a bit.

icon-circle-checkmark verified purchase
Pretty good

As others have mentioned, there is a slight plastic taste to the water, but nothing I can't cope with. The locking mouth piece works well with no visible leaking.

icon-circle-checkmark verified purchase
Lightweight, Comfortable and Protection

I switched from hard plastic bottles to soft flask primary for three reasons; to carry a lighter bottle without losing the volume, for more comfort during runs and for some protection if I trip and land on the floor. I find these soft flask carried vest-on works better than hand-carried. I bought one last week to do a short field test and came back for another this week. These bottles are a major go!

Dear Peter,

Thank you for your kind feedback.  Yes, indeed when compared with a rigid water bottle, the flask is lighter, less noisy when running and does not hinder your movements. And you are right, vest on will free your hands.

You can also visit this link 8487344 - 500 ML FLEXIBLE TRAIL RUNNING WATER BOTTLE BLUE

Thank you,
Sports Advisor

The water bottle is very good and fits well in the front pocket of my decathlon running bag. It is my first time ever having one of these water bottles. The water did not feel bouncing about. The only thin is the plastic taste of the water. Fellow runners say that all brands of these flexible bottles leave a 'bit' of a plastic after taste.

icon-circle-checkmark verified purchase
Flexible trail running bottle

Good bottle good quality

icon-circle-checkmark verified purchase

I would appreciate for sanitary purposes that the mouth piece will have a cover. Thanks.

icon-circle-checkmark verified purchase
Good bottles

Good value for money and the bite valve functions well. I would have given a 5 star rating but there is a slight plastic taste even after washing. But hey, for that price I'm not gonna complain.

icon-circle-checkmark verified purchase
Soft Running Water Bottle

Does not leak. Has a bit of rubber/plastic smell. It will deflate or flatten as the water gets less, which is good because the water will not slosh around inside like in a hard bottle.

icon-circle-checkmark verified purchase
Hi Jeffery!

Thank you for taking time to give us a review on this product :)

Our products are consistently reviewed at every start and end of the collection. Hence, we value your feedback and will work diligently towards improving our future products.

We have more awesome products in all our stores in Singapore so do visit us again or you may also click here to check out on all the new range of items have recently hit the shelves!

Hope to hear another review from you again for our other products and do join our Decathlon Running Club on Facebook! Cheers!

Fazwan | Kalenji & Newfeel Department Leader
Decathlon City Square Mall, Singapore
Perfect soft flask water bottles!

I bought these as spares for my wife's wonderful Decathlon Kalenji running vest, on long runs I can quickly replace the empty flasks with full ones, perfect. MJS

icon-circle-checkmark verified purchase
Flexible running bottle

Bought two of these to use with the 10L kalenji trail pack instead of the supplied 1L bladder. Good quality construction and no taste from the material used, all in all good bottles.

icon-circle-checkmark verified purchase

Very handy product! I love it. :)

icon-circle-checkmark verified purchase

Good size and easy to drink from on the run but I must agree with other comments that the chemical taste is strong. Have washed these several times now and the taste is still there. Other than that they’re great

icon-circle-checkmark verified purchase
Light and easy to carry along for sports.

The only problem is difficult to clean as the mouth opening is pretty narrow.

icon-circle-checkmark verified purchase
Hi Casey,

Thank you for taking the time to leave a feedback for our product! We value all feedbacks as it helps us improve and cater to the needs of our customers.

You are right, it is easy to carry around comfortably in your pocket or trail vest and it is BPA free! For cleaning, it is recommended to rinse it with fresh water and leave it to dry.

We hope to see you in out store again soon!

Your Happy Runner
Wei Hoe | Running Sports Leader
Skip to reviews

Additional Product Information



  • 100% Thermoplastic polyurethane

On/Off System

  • 50% Polypropylene
  • 50% Polyethylene low density

Bite valve

  • 100% Silicone

A flexible flask making your trail runs more comfortable.

Offering you flexible containers for your trail runs is the aim of our design team. Compared with a rigid water bottle, your flask is lighter, less noisy when you run and does not hinder your movements as much. What's more, it occupies less space: You can compress it gradually as you drink the contents, thereby reducing its volume!

How to maintain your flask

To prevent any taste of plastic, rinse your flask in clean water 3 times before using it. Then, dry it upside down without the mouthpiece. If the plastic taste persists, place your dry flask in the freezer. You can remove the mouthpiece to clean it. This is particularly important if you are using sugary drinks! Finally, so that it doesn't make noise while you are running, remember to remove any air by sucking out the air bubbles.

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

With its 500 ml capacity, your flexible flask is useful for about 1 hour of running time, on average. And in order to simplify your preparation and equipment, your 500 ml flask is compatible with all our trail running bags and belts!

A user-friendly design when trail running.

Your 500 mL flask has a thumb hole. It can therefore be carried effortlessly even when you have pushed yourself to the limit during your trail run. 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.

How was the 500 ml flask tested?

To guarantee the quality of the 500 ml water bladder, our design team asked 12 runners to use it during a running session on a treadmill. Much more relaxed than a trail run, running on a treadmill gives you the opportunity to concentrate on the flow rate of the mouthpiece, the taste-free water, the lack of any discomfort when using the mouthpiece, the movements of the flask and the user comfort. With the help of the feedback provided by our testers, we designed a product for trail running.



Product testing

At DECATHLON, our products are tested by a panel of users under the real-life conditions they were designed for. These tests are organized by a team of dedicated technicians. The product managers, engineers and all the teams use the results of all these tests to develop and design technical products that will satisfy our trail runners.

Storage instructions

Rinse the flask thoroughly 3 times when using for the first time. Do not leave water in the flask for more than 24 h. Rinse it with clean water after use and allow to dry before storing.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual