Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs (600 ml), Malibu Blue

The UltraFlask 600 ml, the largest in our ultra-light series, holds more so you can go the distance. Its soft material allows it to fit snugly in most vest pockets, and it shrinks as you drink to minimize water movement. Topped with our SpeedFill cap for quick aid station refills, the UltraFlask is ready for use with or without the tube.

Included in the package are the UltraFlask 600ml Flask, SpeedFill Cap, Drink Tube, Bite Valve, and Basic Care & Use Instructions. The UltraFlask has a capacity of 600 mL / 20 fl oz, weighs 46 g / 1.6 oz, and measures 186 mm x 81 mm / 7.3 in x 3.2 in. It is made of TPU, PP, Silicone, and POM.

HYDRATION VEST COMPATIBLE: The UltraFlask fits easily in most hydration vests, belts, or pack pockets, providing bounce-free stability and a flexible flask shoulder to prevent chafing.

COLLAPSIBLE FLASK: The soft material conforms to any pocket and shrinks as you drink, reducing movement and allowing for easy packing when empty.

PERFECT FOR AID STATIONS: UltraFlasks are equipped with our SpeedFill Cap, designed for quick and easy refilling at aid stations. A side tab pops open the cap in one motion and snaps shut with a click.

CUSTOMIZABLE CAP: The UltraFlask comes with a 42mm customizable cap, allowing you to choose between a straw or bite valve.

BEYOND LIFETIME WARRANTY: If you experience any issue, we'll repair or replace the item for free. Whatever it takes to keep your adventure going.

Go big with the UltraFlask 600 ml, the largest in our ultra-light series. Its features, including the soft material, SpeedFill cap, and customizable cap, make it the perfect companion for your adventures.

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