Hydrapak UltraFlask Speed 500ml

The perfect balance of sleek and stable, Hydrapak's signature UltraFlask has a wider form and a durable 3D welded bottom. Soft and pliable materials ensure you can fit it in most packs and larger vest pockets for a snug, secure fit.

With a lightweight TPU construction with RF-welded seams and a soft design, the UltraFlask Speed Flask is a flexible, durable drinking flask with superior elasticity, perfect for daily running adventures. Thanks to its soft materials, the bottle conforms to the shape of your hydration pack and larger vest pockets for a secure, stable fit. The compressible design shrinks as you drink, meaning reduced water movement and bulk for comfort on the move. The materials are 100% BPA and PVC-free and have a wide working temperature range, so they can be frozen for hot running days. Making the flask easy to refill on race days, the bottle features a SpeedFill cap, which flips open and snaps closed for leakproof transportation, and a large 42mm opening, which means you can also fill with ice or drink mixes. The easy-to-drink bite valve auto-seals after each sip, eliminating annoying drips and making hydration on the go super easy. The UltraFlask Speed can be paired with a 42mm threaded backcountry water filter.