Hot SoftFlask Speed 500ml Water Bottles

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Compact, quick to refill, and comfortable to carry, the HydraPak SoftFlask Speed 500ml is built for efficient hydration without slowing you down.

Hydrapak says: 

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.

Our Verdict

The SoftFlask Speed 500ml fits neatly into vest or belt pockets thanks to its tapered, pinch-welded base and soft material. Weighing just 47g, it shrinks as you drink to minimise bounce, and the bite valve provides a smooth, drip-free flow. The SpeedFill cap is genuinely useful for quick top-ups, and the wide 42mm opening makes it easy to add powders.

– Reviewed by Ultralight Outdoor Gear

Features

• 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.
• 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, minimizing 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)

Specifications

• Weighs: 47g
• Capacity: 500ml / 17fl oz
• Dimensions: 260 mm x 80 mm / 10.2 in x 3.1 in

Material & Construction

• TPU, PP, Silicone, POM, 304SS

Help & advice:

• What does BPA Free Mean?