Flask Running – Lightweight and Practical Hydration for Triathlon and Running

The essential accessory to stay hydrated during exercise

Discover our selection of running flasks — flexible and lightweight water bottles designed specifically for runners, trail runners and triathletes.
Compact, flexible and easy to store in a hydration belt, vest or jersey pocket , running flasks allow you to drink without interrupting your pace .

At Triathlon Store , we have selected for you different models with different capacities, recognized for their reliability and ergonomics .

Flasks adapted to all needs

Our soft running flasks are available in different volumes — 150ml, 200ml, 300ml or 500ml — to suit your distances and preferences.
Thanks to their BPA-free material design, they are safe, durable and easy to clean .
Models with a pipette or leak-proof valve guarantee smooth and rapid hydration , even when moving.

Whether you are preparing for a marathon , on a technical trail or in a long-distance triathlon , our running flasks help you manage your hydration effectively and maintain your performance.

The advantages of soft flasks

Zero sloshing : the volume decreases as you drink.
Ultra-light and compact : they easily slip into any pocket
Leak-proof and plastic-tasting : designed for intensive sports use
Reusable and eco-friendly : a sustainable alternative to disposable bottles

Why choose your running flasks from Triathlon Store?

Large selection of flasks and hydration accessories for running & triathlon
Expert advice to help you choose the right capacity and model for your needs
Fast delivery and responsive customer service in France
Competitive prices all year round on top brands

Optimize your performance and stay hydrated on every race with our Triathlon Store running flasks , tested and approved by passionate athletes!

flask running
soft running water bottle
triathlon soft flask
hydration flask for running
running hydration accessory
trail soft water bottle

Running flask

FiltersFilter & Sort