Precision-Engineered for Hydrogel
The 550ml capacity isn't random - it's exactly what you need for optimal Maurten Drink Mix preparation. 500ml of water plus 50ml of headspace means perfect dissolution every single time – without the guesswork of mixing.
Zero Bounce, Maximum Focus
As you drink, the soft TPU body compresses and conforms to your chest, eliminating the sloshing and movement that breaks your concentration on technical terrain. The bite valve delivers clean flow without squeezing or tilting, so you stay fueled without breaking stride through demanding terrain.
Purpose-Built, Not Repurposed
Most soft flasks are generic vessels that happen to work for running. This one was designed from scratch for trail athletes using hydrogel fueling systems. The result is a flask that makes Maurten's proven nutrition strategy actually practical on technical trails where precision matters.
Mix, Stash, and Fuel On Demand
Pour 500ml of water into the flask, add one serving of Maurten Drink Mix 160 or 320, cap it, and shake using that extra 50ml of space. Slide it into your vest's front pocket with the bite valve accessible. Drink throughout your run as needed. After your session, rinse and hang upside down to dry completely.