What is the HydraPak Stow 500ml?
The Stow 500ml is a minimalist, packable water bottle engineered for hikers, runners, and travellers who value efficiency and simplicity. It holds its shape when full, yet folds and stashes effortlessly when empty, making it ideal for short hikes, daily adventures, or as a backup hydration option on longer trips.
What is it made of?
Durable TPU Construction
The Stow is constructed from high-quality TPU (thermoplastic polyurethane), a material chosen for its unique balance of flexibility and strength. Unlike rigid bottles that can dent, crack, or retain their shape awkwardly when empty, TPU allows the Stow to compress smoothly and repeatedly without damage. It's highly abrasion-resistant, making it capable of withstanding rugged trail use, pack friction, and repeated squeezing or folding.
Clean, Safe Hydration
All materials used in the Stow™ are BPA- and PVC-free, ensuring the water you drink tastes clean and pure. There are no chemical residues to leach into your hydration — even when the bottle warms in the sun or is stored for long periods.
Functional Component Blends
To support secure and effective use, the Stow incorporates PP (polypropylene) and silicone in key structural areas. PP is used at the cap and thread interface to ensure a firm, reliable seal that won't loosen over time, while silicone forms the high-flow, self-sealing nozzle for smooth hydration without dripping. This combination ensures that the bottle is easy to drink from on the move, seals tightly when closed, and resists leaks even when stored horizontally inside a pack. The materials work together to provide a lightweight, efficient, and dependable hydration system.
What are its features?
Pocket-Sized Carry
The Stow is designed to go places hard bottles simply can't. Its soft, flexible construction lets it conform naturally to running belt pockets, vest sleeves, and pack organisers without creating pressure points or digging in. Because it moulds to your body and kit as you move, it eliminates the bounce and bulk often associated with rigid bottles — making it ideal for short missions, fast travel, or any situation where space and comfort are a priority.
Easy Drinking, High-Flow Nozzle
The Stow features a self-sealing silicone nozzle that provides a steady, high-flow sip without requiring a hard squeeze or tipping the bottle. After each drink, the nozzle seals automatically to prevent drips and leaks. A flip-top protective cap keeps the drinking surface clean from mud, sand, dust, and pocket debris, maintaining hygiene and performance in unpredictable outdoor environments.
Filter Compatible
Thanks to its 28mm threaded opening, the Stow works seamlessly with many popular squeeze-style water filters, including the HydraPak 28mm Filter Kit and other market-leading microfilters. This compatibility allows you to collect water from natural sources such as streams and lakes, making the Stow an excellent option for multi-day treks, bikepacking trips, travel, and emergency refills.
Integrated Carry Loop
The flexible bail handle offers multiple carry and storage options. Clip it to your pack, grab it quickly at aid stations, or use it to secure the bottle once rolled up when empty. The loop keeps the Stow accessible, easy to handle, and fast to refill.
Packable and Space-Saving
When the bottle is empty, simply flatten it, roll it up, and secure it with the carry loop. It compresses down to pocket-size, taking up virtually no space inside packs, pouches, or jacket pockets.
Features:
- Pocket-sized flexible bottle fits where rigid bottles can't
- High-flow self-sealing nozzle for smooth, splash-free hydration
- Flip-top cap protects drinking surface from dirt and debris
- Compatible with most 28mm threaded water filters
- Integrated bail handle for carrying, hanging, and filling
- Collapses flat when empty to save space
- Durable TPU construction for repeated folding and use
- BPA- and PVC-free materials for clean-tasting hydration