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Shape-Shift Water Reservoir

4.24 out of 5 stars
25 Reviews

Out of Stock

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Shape-Shift Water Reservoir

Why settle for an average, run-of-the-mill hydration reservoir, when you can have an innovative design and added capacity without bumping up the price? That's just what you're getting with the HydraPak Shape-Shift Water Reservoir, thanks to its adjustable center baffle that keeps things slim when you need a low profile in your pack, then expands to give you more storage when increased water capacity takes precedent. You'll also get a self-sealing bite valve with a twisting on/off bar to ensure that your precious H2O doesn't leak on the trail. A Plug-N-Play connect system makes it easy to connect and disconnect the hose, while an auto shutoff valve instantly works to prevent leaking when disconnected. This reservoir also is fully reversible for easy cleaning and drying, and features a durable, abrasion resistant, and stretchy TPU material to keep it going for many an adventure.


  • Versatile hydration reservoir with an innovative design
  • Center baffle unlocks to give you added water capacity
  • Durable TPU construction is BPA- and PVC-free
  • Self-sealing bite valve prevents wasted water
  • Plug-N-Play system makes it easy to connect the hose in a flash
  • Reversible design makes it easy to clean and dry
  • Wide Slide-Seal top makes for easy filling and leakproof security
  • Item #HPK001J
TPU, HDPE, silicone
2L, 3L
[2L] 13 x 6.5in, [3L] 17 x 6.5in
Claimed Weight
[2L] 4.7oz, [3L] 5.3oz
Manufacturer Warranty

Overall Rating

4.5 based on 26 ratings

Review Summary

1 Stars - 2 reviews
2 Stars - 1 reviews
3 Stars - 1 reviews
4 Stars - 6 reviews
5 Stars - 16 reviews

What do you think about this product?


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5 out of 5 stars

September 18, 2023

Working great!

Working great! I’m on the Camino Santiago and this has been working flawlessly!


Originally reviewed on HyrdraPak LLC

5 out of 5 stars

October 10, 2022

Great quality

Fits my old Hydrapak perfectly . An upgrade over the old original bladder.

T. Caprio

Originally reviewed on HyrdraPak LLC

4 out of 5 stars

September 26, 2022

What's with the change?

This is my third HydraPak bladder. I think the older ones are easier to fill. I don't get the new design with it's smaller opening. It's harder to fill at my kitchen sink. It's harder to add ice cubes in the summer. Otherwise, I think HydraPak products are the best in the field.

J9 From Colorado

Originally reviewed on HyrdraPak LLC

5 out of 5 stars

July 24, 2022

Shape shift 3

Great overall. Lightweight and easy to clean!!!! Would buy again

Rusty Shackleford

Originally reviewed on HyrdraPak LLC

1 out of 5 stars

March 20, 2022

Plastic taste is horrible!

I bought this last year and I have tried to get rid of the horrible plastic taste to no avail. I have even filled it with lemon juice and soaked it for over a week. The intense plastic taste remains!


Originally reviewed on HyrdraPak LLC

5 out of 5 stars

March 17, 2022

HydraPak Shape-Shift

The flexible coated handle allows for easy pouring and carrying. It packs away nice and easy.

user image
Keith R

Originally reviewed on Backcountry.com

3 out of 5 stars

November 30, 2021

Impossible to reseal baffle!

Everything about this water bladder is great, except it's main feature that separates it from a lot of the competition which is the resealable baffle. I loved this bladder and thought it fit great it all my packs until I cleaned it and unsealed the baffle. This would otherwise be an amazing feature because it allows you to clean the inside really easily, but since you can't reseal the baffle (I literally tried for an hour to no avail using various lubricants and methods) it leaves it being a really awkward shape. Maybe it's not as much of an issue with the 2L, but the 3L becomes very long and bulky and makes it hard to pack around because the reservoir protrudes so much. I'm not sure if mine is due to quality control or this is just an inherent feature of the bladder, but it'd be great to hear from Hydrapak about how to actually reseal this thing and make it usable again. It also is really prone to staining, if you use Aquamira it'll turn the reservoir an unpleasant yellow, I also spilled coffee on mine and there's a stain, but it doesn't impact the performance so really not a big deal. Otherwise it lives up to expectations, it's survived many days smushed into my pack full of climbing gear, sandwiched between carabiners and belay devices so it's definitely tough. The sliding seal at the top also makes for easy emptying and refilling. Other than the shape I much prefer using it to the more traditional camelbak reservoirs I've had in the past.


Originally reviewed on HyrdraPak LLC

1 out of 5 stars

August 20, 2021

Inside ripped before I filled first time.

I had to look up how to open and inverse to clean. A bit tough because I thought I'd break it. Directions say, "With a firm grasp of both the front and rear handles, pull the two handles apart from each other in opposite directions. A fair amount of force may be necessary so pull hard. Our reservoirs are tough. They can take it!" No, they apparently can't. I never even filled it with water. Good concept? Maybe. Needs some more work.


Originally reviewed on HyrdraPak LLC

5 out of 5 stars

August 13, 2021

Outstanding Customer Service

I spend a lot of time in the backcountry and had to make an emergency purchase of the shape shift 3L at a local store after my older one (different company) started leaking. I really like that it has baffles that helps with the sloshing around when it’s not all the way full, or that you can open up the baffles to allow even more water into the reservoir. Plus I am thrilled that you can turn it inside out and stick it on the top rack of the dishwasher for easy cleaning. Unfortunately, my very first time taking it out on the mountain mine developed a hole at the top of the reservoir. I don’t know if this way due to it having a pressure point by the way it sat in my pack, me setting my pack down to roughly, or a manufacturer defect. Regardless, I filled out the warranty claim (I figured it was worth a shot) and within 24hrs I had a response letting me know my claim was accepted, and within 48hrs I had a new reservoir being shipped to me. Great customer service speaks volumes to me, and they went above and beyond what most companies are willing to do! Now with all that being said the Shape Shift was the only 3L one in the store with no other options, and I was leaving that day for a trip so I was desperate. After seeing all of Hydrapak’s other products I think the HydraSleeve 3L would be a better all around option for me.


Originally reviewed on HyrdraPak LLC

4 out of 5 stars

June 21, 2021

This reservoir mitigates sloshing and cleans easy

I recently used the Shape-Shift 3L for the first time on a 20k hike up Mt. Cucamonga in Southern California. It worked great. I used it with the baffle closed and it helped eliminate the usual sloshing that occurs as the hike goes on. And I love how easy the Shape-Shift is to clean: just turn it inside out and rinse it off. The included hang tab also helps with drying. As with my other HydraPak products, the construction seems sturdy and I expect it will withstand a lot of use. My only criticism so far is that it is slightly more difficult to fill than reservoirs with a screw top. That said, the ease of cleaning out weighs that small flaw.

Pat N.

Originally reviewed on HyrdraPak LLC