Details
The perfect balance of sleek and stable, our signature UltraFlask has a wider form and a durable 3D welded bottom. Soft and pliable material means you can fit it in most pack and larger vest pockets for a snug and secure fit. Topped with our SpeedFill™ Cap for quick refills.
VEST PACK FIT
Soft material conforms to most hydration packs and larger vest pockets for a secure and stable fit.
HIGH-FLOW
Easy to drink bite valve auto-seals after each sip, eliminating annoying drips.
SPEEDFILL CAP
Designed for fast filling - flips open for quick refills and snaps closed for leakproof transport.
LARGE OPENING
42mm opening lets you fill the flask easily with ice and drink mixes.
COMPRESSIBLE
Flexible design shrinks as you drink, reducing water movement.
FILTER COMPATIBLE
Pair with 42mm threaded backcountry water filters including the HydraPak 42mm Filter Cap
DURABLE
Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity.
100% BPA & PVC FREE
Wide working temperature range (can be frozen - max temp 60° C / 140° F).
Shipping & returns
Free shipping in Canada over $175. Ships from Squamish within a day. 30-day returns in like-new condition: try them on indoors, but shoes that have been run outside can't be returned.