Ultraflask Speed 500ml

Hydration that adapts to your pace. The HydraPak UltraFlask 500ml is engineered for fast-moving runners, racers, and adventurers who need reliable hydration without bulk. Its signature wider shape, soft materials, and welded 3D bottom provide a low-profile, stable fit in most hydration vests and pack pockets.

Equipped with HydraPak’s SpeedFill™ Cap for rapid refills at aid stations or streams, this flask is built for race-day pressure and long-haul durability. It compresses as you drink to eliminate slosh, and the bite valve auto-seals for no-drip performance on the move. Whether you’re chasing a podium or your personal best, the UltraFlask delivers.

• Flexible and form-fitting: Wider shape fits snugly in most vest and pack pockets
• SpeedFill™ Cap: Flip-top design enables lightning-fast refills
• Filter compatible: Pairs with 42mm threaded backcountry filters, including HydraPak’s 42mm Filter Cap
• High-flow bite valve: Self-sealing for clean, fast hydration without leaks
• Durable 3D bottom: RF-welded seams and abrasion-resistant TPU for long-term reliability
• Compresses as you drink: Reduces water movement and saves space
• Safe and clean: 100% BPA- and PVC-free, freezer-friendly, and heat-resistant up to 60°C / 140°F
• Lightweight: Just 42g (1.4 oz), ideal for racing and minimalist kits

Tech Specs

• Capacity: 500 ml / 17 fl oz
• Weight: 42 g / 1.4 oz
• Dimensions: 240 mm x 55 mm (9.4 in x 2.2 in)
• Materials: TPU, PP, Silicone, POM, 304SS