Big Zip EVO Lumbar Reservoir
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Designed for your waist, hip, or fanny pack, the Platypus Big Zip EVO Lumbar Reservoir makes sure you stay hydrated whether you're on the trail or commuting through town. Built with plastic that is BPA-, BPS, and phthalate-free, you'll notice no faint flavor in your crystal clear h-two-oh, and it carries up to 2 liters of the stuff. The bladder is well-designed, with easy filling and drinking features, as well as a leak-proof shut-off for the valve. A semi-rigid center baffle provides low-profile support, and additionally makes the reservoir easier to clean and dry out.
Details
- A hydration bladder designed for lumbar packs
- Certified taste-free construction treated to ward off funk
- Handy pincher grip can be filled single-handedly
- Leak-proof shut-off valve keeps your dry stuff dry
- Self-sealing bite valve improves drinking flow
- Item #CAS00FP
- Material
- platic
- Volume
- 2L (70fl oz)
- Hose
- 5/16in
- Valve
- HyFLO self-sealing bite valve (silicone)
- Dimensions
- 14 x 8.7in
- Claimed Weight
- 5.4oz
- Recommended Use
- backpacking, commuting, hiking
- Manufacturer Warranty
- limited
Reviews
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Overall Rating
3.5 based on 40 ratings
Review Summary
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Selecting an option will reload the available reviews on the pageMarch 29, 2025
They kept cool with ice
They kept cool with ice and easy seal i had plenty of water after a long day
Originally reviewed on a Cascade Designs brand site
November 9, 2024
Best water bladder.
The reservoir did develop a leak from a small hole. What is the recommended material and adhesive to repair it?
Originally reviewed on a Cascade Designs brand site
November 7, 2024
Ok, not perfect
I had a platypus bladder for 6 years, it was great, but It finally had enough (after having a good life) and needed to be replaced. I tried another brand at first, because why not, but that was a mistake. I had very much taken for granted that there are no issues at all with plastic taste in platapus bladders. My replacement platapus reservoir is ok but not as well made and kinda disappointing. There are 2 major issues: 1) the mouth piece pops off the tube all the time and water pours out 2) the big plastic zip top part comes partly off while clipped in my backpack and at other unsuspecting times. I'm waiting for the day this makes a hug mess in my pack, but it hasn't happened yet. In addition to these there is no way to drain water from the small tube attached to the reservoir so you can clean it
Originally reviewed on a Cascade Designs brand site
November 7, 2024
Dependable reservoir
I’ve had this for a year and it is performing as expected. No leaks, functional mouthpiece. Attaches directly to my gravity water treatment system for easy refills, so no worry about water contamination on the trail.
Originally reviewed on a Cascade Designs brand site
November 7, 2024
Not my favourite bladder that I have used.
The backpack strap attachment fell off, the mouth piece consistently leaks, and one time the closure tab came off and all of the water spilled in my bag all within the first couple of uses. I have since had to replace it with a different brand that has been working well.
Originally reviewed on a Cascade Designs brand site
August 12, 2024
Old Big Zip was better
Old big ZIP was better easier to clean. New bags are terrible. Who ever designed this should be fired.
Originally reviewed on a Cascade Designs brand site
June 12, 2024
I am very displeased
My reservoir was delivered two days before my backpacking trip and arrived with a small hole in it. This caused it to leak and resulted in the inability to use it during my backpacking trip. I was extremely disappointed in the fact that it arrived in this poor condition because I specifically bought this because it was supposed to be a good brand. I tried calling the number for the website and no one ever answered so I am very displeased and will not make another purchase from this company.
Originally reviewed on a Cascade Designs brand site
January 14, 2024
Confused
Purchased a 3L and loved it…..until the bite valve came off and we found that the bite valve & shut off valve were filled with some sort of gel-like substance. Can’t even remotely clean it out. Searched for info on what it is, and can’t figure out what it is. SO disappointed.
Originally reviewed on a Cascade Designs brand site
October 17, 2023
Non sealing
I have used various Platypus units since they first hit the market. I got a 2L Evo as my Big Zip SL developed a small hole at the bottom. I put this in my bag and into the boot of the car. Ninety minutes later most of the water was in my rucksack or the car. The top seal is hopeless even with the poorly fitting blue “handle”. Water pours out. Useless. What have you done Platypus?
Originally reviewed on a Cascade Designs brand site
July 30, 2023
Bring back old platypus
I loved the 3L big zip LP with the platypus bag. I told myself I’d never buy another brand. But now platypus has changed their bladder and it does not fit properly in their old bag. And to make matters worse they don’t even sell bags anymore to fit their new EVO packs. This company has gone downhill fast.
Originally reviewed on a Cascade Designs brand site
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Platypus Big Zip EVO for hiking and biking2L hydration bladder for lumbar packsTaste-free hydration reservoir for outdoor adventuresLightweight and durable lumbar reservoir for commutingLeak-proof design for worry-free hydrationEasy-fill and drink features for on-the-go useBPA-free hydration solution for health-conscious usersSelf-sealing bite valve for improved drinking flowCompact hydration bladder for minimalist backpackersUser-friendly hydration system for all agesVersatile reservoir for various outdoor activitiesMade in USA hydration solution for quality assuranceLearn more about Big Zip EVO Lumbar Reservoir