3D Hydro 3L Reservoir
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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
Reviews
Q&A
What do you think about this product?
Overall Rating
5 based on 44 ratings
Review Summary
Customer Images
Here's what customers have to say
The hydration reservoir is generally well-received by customers, with many praising its ease of use, including the wide mouth for filling, detachable hose, and carrying handle. Customers appreciate the flat design that sits comfortably against the back, as well as the strong magnetic clip to keep the hose in place. Many users report the reservoir is durable, leak-proof, and easy to clean and dry. Some customers note the capacity may be more than they need, but overall the reservoir is described as a high-quality, thoughtfully designed product that works well in a variety of backpacks. A few customers had minor issues, but the vast majority of reviews are positive and recommend the product.
AI-generated from the text of customer reviews.
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Selecting an option will reload the available reviews on the pageJuly 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!
Originally reviewed on Gregory
July 3, 2025
Nice product
Great water bladder. I like the quick connect hose. In addition the magnet for quick connect is very nice
Originally reviewed on Gregory
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.
Originally reviewed on Gregory
June 6, 2025
Gregory 3D Hydro 3L Reservoir
I haven't used my Gregory Reservoir as yet, but the construction & quality appear to be much better than other brands I've owned. Thank you, Gregory! Satisfied customer
Originally reviewed on Gregory
June 6, 2025
New “can’t live without” item!
Easy to use, and easy to clean. This product is a game changer when hiking.
Originally reviewed on Gregory
May 1, 2025
Well made
These are so well made. Very nice addition to my Gregory pack.
Originally reviewed on Gregory
March 25, 2025
Ideal hydration bladder!
This is my go to hydration bladder. It has so many perks, but the very best thing about it is the ability to hold the handle and really control filling it. It has a little (hanging it up to dry) hook that folds in and out. It’s easy to clean, even having the couple supports internally. I can get a brush inside. The bite valve works perfect, does not leak and has a lock on it. The hook to latch it in upright my Gregory kalmia 60 makes it compatable and easy to remove or put in my smaller deva pack. It’s never failed me, no leaks. I’m even a little rough with the thing. Love love love Gregory products!
Originally reviewed on ExpertVoice.com
March 14, 2025
Perfect!
Great hydro pack! Easy in and out of the pack, and fill process. Quick connect hose is a must.
Originally reviewed on Gregory
March 6, 2025
Perfect festival reservoir
I got this reservoir to use for a music festival and it worked perfectly. I love the detach system so you can leave the tube where it is when you take it out to fill it up. I will also use it for any long hikes I go on
Originally reviewed on ExpertVoice.com
January 8, 2025
I’ve used this on a back country hiking trip. Love the handle, a lot easier to use versus some other brands. Thank you Gregory for keeping it simple:)
Originally reviewed on ExpertVoice.com
Do you have a question about this product?
July 15, 2025
Is the TPU used inside in the bladder Food-Grade TPU? If not I read that it could be dangerous to use…
Originally reviewed on Gregory
July 2, 2025
Is this compatible with the Miko 20 Pack?
Originally reviewed on Gregory
January 14, 2025
Would this fit in the Gregory Swift 16L H2O bag?
Originally reviewed on Gregory
November 4, 2024
What is the tubing? Nylon?
Originally reviewed on Gregory
September 4, 2024
What is the inner diameter of the tubing?
Originally reviewed on Gregory
August 23, 2024
Can you put hot water in this to use as a hot water bottle at night?
Originally reviewed on Gregory
May 26, 2024
Can you give the size of the O-ring that seals the hose connection to the reservoir for the 3L size? I lost the O-ring and cannot find the dimensions to purchase a replacement. Love this product and want to keep using it! Thanks
Originally reviewed on Gregory
March 31, 2024
How do I get the plastic taste out of the reservoir. I took it on a week hike in the Alos in Switzerland and could not drink the water it tasted horrible and I cleaned it appropriately before use. Thank you.
Originally reviewed on Gregory
October 16, 2023
How do you get the water flowing the first time. It won't come out. What am I missing?
Originally reviewed on Gregory
April 20, 2023
Is there any difference between these 3D reservoirs and the original 3D reservoirs?
Originally reviewed on Gregory