#8 on this list
VectoX
CNOC Outdoors
The CNOC Outdoors VectoX is tailored squarely at backcountry backpackers who view their hydration reservoir as the core of their water treatment system. Constructed from durable, flexible thermoplastic polyurethane (TPU) that is significantly thicker than standard ultralight bags, the VectoX solves the common problem of bags bursting under pressure when squeezing water through microfilters like the Sawyer Squeeze or HydroBlu Versa Flow. The genius of the VectoX lies in its dual-opening architecture. The back end features a wide slider opening that allows you to scoop dirty water from flat pools and sluggish creeks in seconds without needing a separate scoop. The front end features a rigid 28mm threaded neck, allowing direct attachment of standard threaded filters or a drinking tube conversion kit. This turns the bladder into a high-capacity squeeze pouch, a hands-free gravity filter, or a pack reservoir depending on how you configure it. Because the VectoX was originally conceived as a collection and filtration vessel, using it strictly as a hydration bladder requires purchasing an aftermarket hose kit. The heavy-duty TPU material, while remarkably tough against pressure punctures, is stiffer to handle in cold weather. For long-distance backpackers who want one modular container to collect dirty water, squeeze-filter on the move, and sip from during long trail days, the VectoX is virtually in a class of its own. **Highlights** - Dual-opening system with wide slide-top scoop end and 28mm threaded neck - Direct compatibility with popular hollow-fiber filters for squeeze or gravity filtration - Reinforced TPU construction withstands high squeezing pressures without bursting - Tethered neck cap and slider prevent lost components in backcountry settings - Easy to clean and dry out thanks to the full-width rear opening **Watch-outs** - Requires separate drinking tube kit for hydration bladder operation - Material can feel stiff and slightly unwieldy in sub-freezing temperatures - Threaded neck can leak if filter O-rings are improperly seated
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#9 on this list
Hydraulics Reservoir
Osprey
The Osprey Hydraulics Reservoir, developed in collaboration with HydraPak, is designed specifically for backpackers carrying large loads on multi-day journeys. Osprey tackled the structural issues inherent in soft reservoirs by adding a lightweight, semi-rigid backer plate. This plate maintains the bladder's flat profile when full, keeping it from bulging into your back panel and distorting your backpack harness geometry. In field reviews, the Hydraulics Reservoir shines for how smoothly it drops into packed gear. The rigid backplate lets you slide a fully filled bladder directly into an already packed backpack compartment without getting caught on sleeping bags or stuff sacks. The Slide-Seal top opens wide for quick filling, while an ergonomic carry handle offers solid leverage at backcountry creeks. Osprey also incorporates a magnetic bite-valve dock that clips directly onto your pack sternum strap, keeping the hose securely anchored rather than dangling in the dirt. The integrated backplate that gives the reservoir its best features is also its biggest liability. At 7.4 ounces, it is on the heavier side of modern bladders, and the rigid spine prevents you from folding, rolling, or inverting the reservoir for cleaning. If you already use an Osprey backpack with a matching magnetic sternum buckle, the Hydraulics is an exceptional, seamless upgrade; if low weight and compact packing are your top concerns, it may feel overbuilt. **Highlights** - Rigid backer plate allows effortless insertion into fully loaded backpacks - Magnetic bite-valve clip secures drinking tube neatly to your sternum strap - Slide-Seal opening provides wide access for refilling and sponge cleaning - Internal baffle system stabilizes water weight to prevent shifting - Ergonomic carry handle simplifies filling and transport around camp **Watch-outs** - One of the heavier reservoirs in its category due to the structural backer plate - Cannot be rolled up, collapsed, or turned inside out for drying - Backplate requires extra patience to air-dry the rear interior surface
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Specs side by side
| Spec | VectoX | Hydraulics Reservoir |
|---|---|---|
| Total Weight | 6.03 oz (bladder, adapter, and hose) | — |
| Bladder Weight | 3.25 oz | — |
| Dimensions | 13.5 x 7 inches | 15.4 x 6.9 inches |
| Thread Size | 28mm standard neck | — |
| Material | Heavy-duty thermoplastic polyurethane (TPU) | — |
| MSRP | Around $44 | — |
| Weight | — | 7.4 oz (210 g) |
| Closure Style | — | Slide-Seal top opening |
| Backer Support | — | Semi-rigid hydrostatic plate |
| Disconnect | — | QuickConnect hose port |
| Approximate Price | — | Around $50 |
What our reviewers liked and didn't
VectoX
- Direct 28mm thread compatibility with Sawyer and HydroBlu filters
- Wide-mouth slide closure enables fast filling from shallow sources
- Heavy-gauge TPU withstands aggressive squeezing without seam bursts
- Full-width opening makes internal cleaning and air-drying simple
- Requires an adapter kit to function as a drinking bladder
- Heavy-duty TPU stiffens noticeably in sub-freezing weather
- Lacks internal baffles to reduce water slosh inside a pack
Hydraulics Reservoir
- Semi-rigid backer plate slides easily into crammed backpacks
- Magnetic bite valve keeps drinking tube anchored to chest harness
- Wide Slide-Seal top opening simplifies refilling and interior access
- Sturdy carry handle offers controlled one-handed filling
- Heavier than traditional soft reservoirs due to rigid plate
- Cannot be inverted or rolled up for compact storage and drying
- Magnetic valve can collect iron-rich trail grit over time
Prices change constantly — the figure shown is the last verified catalog price, and the buy buttons always go to the current listing.