UltraFlask® X Hydrapak 250ml

Most flasks carry your gel. Ours allows you to dose it. Developed with Hydrapak and custom-graduated by Pyrène, the UltraFlask 250 ml allows you to split your carbohydrate intake. You always know how much you've taken and how much you have left, to stick to your strategy from start to finish.

With a little more volume than the 150 ml, it covers medium-length outings, half-marathons and short trails while remaining compact. Compressible, it slips into a vest pocket, folds as it empties, and doesn't bounce. Its wide-opening silicone valve allows both thick gels and liquids to pass through, and its clip-on cap keeps the mouthpiece clean between uses. A single reusable container instead of several sachets: less waste, more autonomy.

Highlights

• Exclusive Pyrène graduations: precise dosing without scales
• Flexible and compressible: folds up when empty, stores anywhere
• Wide-opening silicone valve: thick or liquid gels, even on the move
• Reusable, BPA and PVC free
• Ideal size for medium-length outings: half-marathon, short trail, gravel

Features

• Capacity: 250 ml (up to ~6 gel doses) 
• Materials: TPU, polypropylene and POM — BPA and PVC free
• Graduation by gram of Pyrène gel. 

Tip: fill your flask with the dose calculated by our calculator (or your Metabolic Scan), and let the graduations do the rest.