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Gregory
3D Hydro 3L Reservoir

5 out of 5 stars
3 Reviews
$44.95
Color:Ocean/Orange

Size:

Quantity

Only 1 In stock


Why We Like The Gregory 3D Hydro 3L Reservoir

The Gregory 3D Hydro 3L Reservoir is built to be easy to clean and easy to fill, with all the adaptability we need for our biggest adventures. The Hydro is constructed with a soft-molded 3D shape that's self-supporting and prevents the bottom and top layers from folding in on themselves, which promotes a faster dry time and limits odor buildup. A full-length baffle along the interior of the bladder discourages the reservoir from sloshing around as we hike or bike. Meanwhile, the crescent-shaped handgrip makes for an easy, spill-free filling experience, and the QuickDry Hanger provides effortless storage and drying once we're done for the day.


Details

  • Versatile hydration reservoir with bottle-like perks
  • Open construction for quick drying and easy cleaning
  • Speedclip attachment locks bag in place in Gregory Packs
  • Integrated hanger makes for quick drying or hanging on trail
  • Soft molded handle provides steady grip for filling
  • Drylock magnetic bite valve makes hydration easy to access
  • Anatomical construction allows reservoir to sit flat on the back
  • Item #GREZ08Q
Material
metallocene polyethylene
Volume
3L (183cu in)
Hose
inline, quick-disconnect
Valve
soft spout bite, magnetic clip
Dimensions
3 x 17.2 x 7in
Claimed Weight
7.1oz
Manufacturer Warranty
limited lifetime
Activity
backpacking, enduro, hiking, trail

What do you think about this product?

Overall Rating

5 based on 51 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 4 reviews
5 Stars - 46 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

Customer Images

Here's what customers have to say

The hydration pack features a robust and durable construction with a wide mouth, flat back, and 3D design that make it easy to fill, clean, and dry. The detachable tube and magnetic clasp are convenient. Some users experienced issues with the connector or hose leaking over time, and the reservoir takes longer to dry out compared to other brands. Overall, the hydration pack offers thoughtful design and solid performance, especially for outdoor activities.

AI-generated from the text of customer reviews.

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5 out of 5 stars

October 6, 2025

This has everything you could want in a hydration bladder! I don't think I will ever want a different bladder style.

Kelsey H
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

September 23, 2025

Robust an Durable with solid features

Well made, durable on a number of trips over the past year from short hikes to week-long treks in the Hindu Kush. I love the handle and 3D shape, makes handling very easy. The feature that would make it virtually perfect would be to make the threads of the cap match that of a wide-mouth Nalgene water bottle. This would enable the bladder to be efficiently and easily filled with an MSR Guardian purifier directly screwed onto it. It would really take the experience to the next level, but it is certainly solid where it's at.

Tyler N
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

September 4, 2025

3D HYDRO 3L RESERVOIR

Ease of cleaning, the 3-D characteristics of the design and the hanger, that it remains open with airflow/cleaning drying process. Also the design of the quick connect two piece hose as being located approximately even with the water fill cap. This makes it easier to change out hoses. The on and off mechanism push your pole to disable water flow in mouthpiece. Well thought out to sign. It just works no gimmick.

Fred H
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

August 2, 2025

It works well.

Familiarity:
I've used it several times

I have mixed feelings on this hydration bladder. It works like advertised. I like how it hooks into the Gregory packs and stays in place. I really like how it holds itself open for drying. The magnetic clip is nice addition too. The mouth piece works well and in general it does a fine job. What I didn’t like, is that its 3D design makes it hard to fill in a shallow sink like most hotels have. I could only get about 2 liters in the bladder out of those sinks. Also the mouth piece doesn’t fit through the opening on my Gregory hydration pack, so I have to separate the hose at the coupling and feed it through. The problem is that if you have the tube full of water, when you uncouple the tubing, it leaks/drips a little. The amount that it drips is tolerable. All in all, it does the job well!

NH Ed
5 out of 5 stars

July 30, 2025

Perfect for long hot hikes

Fits like a glove in my day pack and is easy to clean.

QLERN
Gregory

Originally reviewed on Gregory

5 out of 5 stars

July 28, 2025

Great product

I love the Gregory Reservoir placed inside and on top of everything horizontally and in the side pockets. Returning due to ordering the wrong size.

RRFiske
Gregory

Originally reviewed on Gregory

5 out of 5 stars

July 16, 2025

Well worth it.

This thing is awesome. I bought some cheaper ones on a rainforest site but was just never happy with them. Cleaning and drying was difficult on those. The structured part of this makes cleaning and drying a breeze. Also, the connection makes it super simple to get the reservoir in your bag and than connect. Highly recommend, don't waste your money on anything else, you'll just end up getting this one in the end.

TimH
Gregory

Originally reviewed on Gregory

5 out of 5 stars

July 7, 2025

Amazing 3L Bladder

After finally upgrading packs (to Nano 16 from a smaller Osprey pack) and upgrading water bladders to a 3L (from a 2.5 Osprey) I am so happy I tried Gregory. I love how you can easily snap off the bladder hose when filling up or drying out the bladder. I love how the bladder also has a hook attached, so you can easily hang it up to dry. It opens and closes very easily. This 3L bladder was perfect for our daily excursions in Costa Rica, and I will be taking this for day hikes in Crusted Butte in a couple weeks and can’t wait!

rebecca0109
Gregory

Originally reviewed on Gregory

5 out of 5 stars

July 3, 2025

Nice product

Great water bladder. I like the quick connect hose. In addition the magnet for quick connect is very nice

Dusty
Gregory

Originally reviewed on Gregory

1 out of 5 stars

June 7, 2025

BROKEN AGAIN!

This is my second Gregory 3D hydro 3L reservoir. I purchased this to replace the one that broke after only about six months of use. NOW THIS ONE HAS BROKEN AS WELL, after only about 4-5 uses. It appears that the connector is the issue. There is no pressure in the tube to be able to receive water, it just bubbles and goes nowhere.

CAROLA
Gregory

Originally reviewed on Gregory

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