HydraPak Ultraflask + Filter Cap hydration flask, grey with HP Blue cap

HydraPak Ultraflask + Filter Cap hydration flask, grey with HP Blue cap is a lightweight, collapsible water carrier engineered for active use. The grey flexible body compresses as water is consumed, reducing bulk in a pack. The HP Blue filter cap provides a controlled flow and protects the drinking mouthpiece, combining a soft, packable reservoir with a practical cap designed for running, hiking and travel.

Advantages

The Ultraflask's collapsible design significantly reduces carried volume as liquid is used, making it easy to stow in pockets or small compartments. The HP Blue filter cap regulates flow for on-the-go drinking and shields the mouthpiece from dirt and debris. Constructed from flexible, BPA-free materials, the flask is simple to fill, squeeze and compress when empty. Its low weight and compact profile improve comfort during dynamic activities.

Suitable for

• Trail running and road running where lightweight, packable hydration is required
• Day hikes and multi-day treks aiming to save space and weight
• Travel and commuting when a compact water container is preferred
• Outdoor events and sports where stowable, quickly accessible water is useful

Key specifications

• Collapsible soft flask body in grey for reduced pack volume
• HP Blue filter cap with protective mouthpiece and controlled flow
• Lightweight construction for minimal carrying weight
• Flexible material compatible with repeated filling and squeezing
• Compact, packable form when empty

How to use

Open the HP Blue filter cap and fill the Ultraflask with potable water up to the recommended fill level. Close the cap until it seals, then use the cap's flow mechanism to drink directly while moving; squeeze the flask gently to increase flow when needed. After use, empty remaining water, wash the flask with warm soapy water or follow manufacturer cleaning instructions, allow to air dry fully while open, and store compressed to save space.

Usage recommendations

For best performance, rinse the cap and mouthpiece after each use and avoid storing liquids for extended periods. Inspect the cap and soft body regularly for wear or damage, and replace if seal or flow control is compromised. Do not expose to high heat or open flame. Use only with potable water and follow local guidance for water treatment when refilling from natural sources.