The SoftFlask Speed is specifically designed to be compatible with the widest range of vests and packs. Replacement or upgrade, the pinch-welded bottom makes loading into pockets a cinch. Its secure, single-handed SpeedFill™ flip top makes filling fast — both water and fuels — and the self-sealing silicone bite valve delivers sips, not drips. And all this weighs just grams.

• BPA and PVC Free | Lightweight | Packs Down | Speedfill Cap. 
• Made for Fit: Soft material and an innovative pinch-welded base creates a low-profile tapered flask — designed to fit almost any vest, belt, or pack pocket.
• High Flow: Easy to drink bite valve auto-seals after each sip, eliminating annoying drips.
• 100% BPA & PVC Free: Wide working temperature range (can be frozen - max temp 60° C / 140° F).
• Durable: Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity.
• Filter Compatible: Pair with 42mm threaded backcountry water filters including the HydraPak 42mm Filter Cap.
• Compressible: Flexible design shrinks as you drink, minimizing water movement.
• Large Opening: 42mm opening lets you fill the flask easily with ice and drink mixes.
• Speedfill Cap: Designed for fast filling - flips open for quick refills and snaps closed for leakproof transport.