What is the HydraPak Flux 750ml?
The HydraPak Flux bridges the gap between a rigid water bottle and a flexible flask. It combines the stability of a bottle that stands upright with the packability of a soft, collapsible design.
Whether you're hiking, bikepacking, or travelling light, the Flux keeps water accessible without taking up unnecessary space when empty. It's shaped to fit easily into pack side pockets and features a comfortable carry handle for quick grabs on the move.
What is it made of?
Durable TPU Construction
Crafted from ultra-durable TPU (thermoplastic polyurethane), the Flux offers long-lasting flexibility with resistance to abrasion, punctures, and stretching. The RF-welded seams create a leakproof, rugged structure capable of withstanding repeated compression and folding.
Lightweight and Safe Materials
Weighing only 92g (3.2oz), the Flux is 50% lighter than most hard bottles while remaining strong enough for demanding use. It's also BPA- and PVC-free, ensuring clean, pure-tasting hydration without chemical leaching — even in hot or cold conditions.
Functional Design Details
Supporting materials like PP (polypropylene) and POM (polyoxymethylene) are used in the nozzle and cap assembly for strength and reliability. Together, they deliver a smooth drinking experience and secure, leak-free performance mile after mile.
What are its features?
High-Flow Nozzle
The twist-to-drink nozzle delivers a fast, splash-free flow, allowing you to hydrate quickly during activity. Its design eliminates the need to remove caps entirely, minimising spills and keeping your focus on the trail.
Protective Dust Cover
A flip-top dust cap shields the nozzle from dirt, mud, and grime — perfect for trails, travel, and backcountry use. It opens easily with one hand and locks securely when not in use, ensuring your hydration stays clean and hygienic.
Filtration Compatible
The 42mm threaded neck fits most popular water filters, including the HydraPak Filter Cap and Katadyn BeFree, transforming your bottle into a lightweight, packable filtration system for safe drinking water anywhere.
Flexible Bail Handle
The soft, reinforced bail handle makes carrying easy and comfortable, even when the bag is full. It also doubles as a strap to secure the rolled-up bottle when empty, keeping your pack organised and compact.
Pack-Friendly Shape
Engineered with a structured silhouette, the Flux fits snugly into backpack bottle pockets without flopping or shifting. When empty, simply flatten and roll it to save valuable space — perfect for minimalist packers.
Lightweight and Compact
Weighing 50% less than traditional bottles, the Flux packs down to palm-size when empty. Ideal for fast and light adventures, it keeps your load streamlined without compromising hydration capacity.
Features:
- Twist-to-drink nozzle delivers high-flow hydration with less splash
- Protective dust cover keeps the nozzle clean on dusty trails
- Compatible with most 42mm water filters (HydraPak Filter Cap, Katadyn BeFree)
- Flexible bail handle for easy carrying and compact storage
- Structured design fits bottle pockets and stands upright when full
- 50% lighter than a hard bottle, compresses flat when empty
- Durable, puncture-resistant TPU with RF-welded seams
- BPA- and PVC-free for safe, clean hydration