Hydrapak’s UltraFlasks™ are designed to conform to the shape of your body, compressing as you drink – this means reduced sloshing and bouncing, less spillage, and an easier time drinking Tailwind. The clear design eliminates guessing how much hydration you have left and when it’s empty, the pliable body of the flask collapses into the hard top, making this the perfect bottle for multi-stage events.
Our soft flask is compatible with your existing gear and has been successfully tested with the majority of Ultimate Direction, Salomon, and Nathan vests as well as countless bicycle jerseys and backpacks.
Weight – Weighing just 24g empty, this flask is light as a feather.
Dimensions – 225 x 77 mm
Capacity – Holds up to 500ml

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Lightweight and compact, Hydrapak’s UltraFlasks™ collapse as you drink. This eliminates sloshing and allows you to pack the empty flask tightly to stow on the go. Perfect for integrating into hydration vests, belts, or handheld systems. Suited for a full range of year round activities, and backed by Hydrapak’s leakproof warranty. 500ml capacity.

Additional information


500 ml Soft Flask