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Platypus Big Zip EVO Review

This favorite offers burly and reliable construction best for hiking and backpacking.
Editors' Choice Award
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Price:  $40 List | $36.95 at Backcountry
Compare prices at 3 resellers
Pros:  Durable, reliable, fast flow rate, easy to fill
Cons:  Wider profile doesn't fit narrow hydration sleeves
Manufacturer:   Platypus
By Amber King ⋅ Senior Review Editor  ⋅  May 16, 2019
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85
OVERALL
SCORE


RANKED
#1 of 9
  • Ease of Use - 25% 9
  • Ease of Care - 25% 8
  • Ease of Filling - 20% 9
  • Quality and Durability - 15% 9
  • Weight and Packability - 15% 7

Our Verdict

Stealing the show, the new and improved Platypus Big Zip Evo is our new favorite hydration bladder! The previous design saw a complete facelift that took it from zero to hero (we weren't very impressed with the older version in the past). It has a new bite valve and hose, various connector points and reservoir that offers much better durability and ease of use. While it's not as light as the Geigerrig Hydration Engine, our previous Editors' Choice winner it has a reservoir that is burlier and more reliable. It offers a faster rate of water flow and a better taste. Our only caveat is it's a wider profile that isn't compatible with super narrow backpack sleeves. Ladies and gentlemen, introducing our new, favorite hydration bladder that will keep you hydrated all day long.


Compare to Similar Products

 
Awards Editors' Choice Award Top Pick Award  Top Pick Award Best Buy Award 
Price $36.95 at Backcountry
Compare at 3 sellers
$34.99 at Amazon
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$29.15 at Amazon
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Pros Durable, reliable, fast flow rate, easy to fillLightweight, slim profile, simple to use, easy to cleanMany innovative uses, slim profile, pressurized system, fairly lightweight, easy to fill, dishwasher safeLightweight, super packable, durable material, inexpensive, incredibly versatileEasy to fill, large screw top opening, inexpensive, great bite valve, narrow profile, compatible with most packs, divided compartments prevent sloshing
Cons Wider profile doesn't fit narrow hydration sleevesNot as durable as other optionsExpensive, small learning curve, no measurement on bag, initial plasticky taste, not our favorite bite valvePoor taste, does not come with hose or bite valve, doesn't pack easily into backpack sleevesSomewhat difficult to clean, harder to fill in trickling streams
Bottom Line This favorite offers burly and reliable construction best for hiking and backpacking.A lightweight and slim bladder for any on-the-go athlete.This notable bladder offers a pressurized system and a great all-around hydration system.This reservoir is lightweight and durable with many functions.This high value winner features stellar performance for a decent price.
Rating Categories Platypus Big Zip EVO Shape-Shift Reservoir Geigerrig Hydration Engine MSR DromLite Bags CamelBak Crux Reservoir
Ease Of Use (25%)
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8
Ease Of Care (25%)
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Ease Of Filling (20%)
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Quality And Durability (15%)
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Weight And Packability (15%)
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Specs Platypus Big Zip EVO Shape-Shift... Geigerrig... MSR DromLite Bags CamelBak Crux...
Weight of Bladder & Tube (3L, *2.5L system,**4L system) 6.90 oz 5.40 oz 6.40 oz 5.20 oz** 8.0 oz
Bladder Capacity Options (liters) 1.5L, 2L, 3L 2L, 3L 2L, 3L 2L, 4L, 6L 1.5L, 2L, 3L
Dishwasher Friendly? Not specified Yes Yes No No
Plastic Taste No Yes Yes Yes Yes
BPA-free? Yes Yes Yes Yes Yes
Bite Valve HyFLO Self-sealing Bite Valve Bite valve with shutoff twist valve Bite valve with shutoff twist valve None (Bite valve with lock arm shutoff valve in separate attachment kit) Bite valve with HydroLock shutoff valve
Can bite valve be removed? Yes Yes Yes Yes Yes
Hose Connection Mid-tube, but can be changed to the base. Quick Release Quick release (no swivel) Quick release hose (no swivel) At the mouth of the screw top Quick release hose (no swivel)
Closure Type Zip top Slide top Slide top Screw top (3 in 1 spouts) Screw top
Warranty Limited warranty Lifetime warranty 30-day money back guarantee Limited warranty Lifetime Guarantee

Our Analysis and Test Results

Our Editors' Choice Award winner is highly versatile, quite durable, and offers fast and effective water delivery. Designed with a "no plastic taste" guarantee, this product surely does deliver, providing taste-free water right out of the packaging. It's one of the few bladders we'd trust on a long backpacking trip and offers functionality for the odd run or day hike as well. It has many connection point options that provide great versatility and allows the user to optimize it to their liking, making it a great option for a wide range of users.

Performance Comparison


A look at our Editors Choice winner that is both durable and reliable.
A look at our Editors Choice winner that is both durable and reliable.

Ease of Use


The big bite valve and wider tube used with the Platypus Big Zip offers the best rate of water flow and is comfortable to drink from. It's easy to load into a bag but has a wider profile.


The bite valve is relatively larger than other options out there and fits comfortably into the mouth. This new bite valve is a step up for the previous version. The lock on it is a big lever that opens and closes smoothly. Over the last months of testing, it hasn't clogged up or been hard to turn, even while ski touring with a pair of gloves on.

Flow is fast which is great for on-the-go activities like running or hiking.
Flow is fast which is great for on-the-go activities like running or hiking.

The tube clips into a point half-way up the tube, which makes unclipping the tube from the bladder nice and easy. While on a climbing trip, we had our bladder stuffed deep into the back of the pack, with gear and a rope inside. To load up with water, we simply unclipped the tube from this point, and removed the bladder, making it easy to access. This clip in point makes the bladder a great option for backpacking or longer trips.


If you don't like the clip-in point half-way up the tube, you can simply pull the hose off the bottom attachment point, remove the mid-clip-in hardware, and reattach the tube to the bottom of the bladder. We haven't found any other bladder that offers this type of clip-in versatility. We really appreciated this when we wanted a little less hose (it's very long) and wanted to reduce weight on a longer trail run.

A look at a few of the different bite valves. Top: Geigerrig Hydration Engine. Middle: HydraPak Shape-Shift. Bottom: Platypus Big Zip Evo.
A look at a few of the different bite valves. Top: Geigerrig Hydration Engine. Middle: HydraPak Shape-Shift. Bottom: Platypus Big Zip Evo.

Another consideration is how easy it is to load into a backpack. Given that the material is more rigid and there is a center baffle in the center, it holds it shape well, doing better than most bladders tested. As a result, it can easily be loaded into an empty backpack or running bladder. Unfortunately, it has a wide profile, making it so that it doesn't work with some narrow hydration backpack sleeves.

A look at the ziptop enclosure with the complementary slide top for additional protection.
A look at the ziptop enclosure with the complementary slide top for additional protection.

Ease of Care


Caring for this bladder is easy. Many of the tube components completely disconnect, and the plastic used does not promote bacterial growth.


While running, mountain biking, and backpacking, we've learned that this system is pretty simple to care for. The tubes all disconnect from the hardware and their attachment points, allowing you to access all the different areas for cleaning with a brush if necessary.

A look at how the different parts come undone for cleaning. The tube also detaches from the base  making for easy care.
A look at how the different parts come undone for cleaning. The tube also detaches from the base, making for easy care.

The bite valve can easily be taken apart and put into a cleaning solution to ensure bacterial growth does not ensue. The reservoir itself has a semi-rigid baffle in the center that prevents the two sides of the plastic from collapsing on each other when empty. This helps to promote airflow throughout the bag. The opening is hard to keep open, but we felt that by simply placing a pair of tongs at the opening did a good job to help with the drying out process.

A look at the easy pouring and filling spout that can be used with one hand.
A look at the easy pouring and filling spout that can be used with one hand.

Our only caveat with the care system is with the opening of the reservoir. The size is fairly small, not really allowing you to get a scrubbing tool inside with ease. Nor does the bag flip inside out. While we did use this bag with sugary substances that could cause bacterial growth, we were especially careful to rinse out the bag with a cleaning tablet. If bacterial growth had been encountered, we could imagine cleaning it out would be problematic in comparison to other options that can flip inside out, like the Geigerrig Hydration Engine. Aside from that, it's easy to care for, but you need to be diligent if using sugary fluids in the bladder.

Ease of Filling


The Platypus Big Zip uses a zip-top with a slide-top enclosure to ensure that the bladder does not leak once it's filled up. The filling process is pretty simple given the opening, and it can collect water from most water sources easily.


The Big Zip now has a handle that doesn't function for traditional use. Instead of putting fingers underneath it, like a handle, you pinch both sides to keep the bladder open with just one hand! This makes filling in a sink or from a spout super easy. The zip-top isn't as versatile as the HydraPak ShapeShift or other bladders constructed by HydraPak simply because it doesn't have an elongated collecting and pouring spout that allows you to collect easily from shallow, flowing sources. Trying to fill from rivers, lakes, or taps is quite simple with this new design.

The handle that you pinch to get a one-hand fill.
The handle that you pinch to get a one-hand fill.

Our caveat with the filling system is with the zip top enclosure. While we appreciate both the zip and slide top to ensure no leakage, the zip top can be challenging to close. It is constructed of two pieces of heavy plastic that work like a super thick ziplock bag. While this is okay for warmer weather where your fingers can really press both sides together efficiently, it's problematic in cold weather. That aside, it's easy to use and collect water from most water sources in most types of weather.

The filling process is super easy!
The filling process is super easy!

Quality and Durability


If you're seeking a durable bladder that you're not afraid to throw around, we can say the Platypus Big Zip is where it's at. The reservoir features welded seams with a plastic material that is thicker than any of the other hydration bladders tested. It's puncture-resistant with great hardware integrated into the design. It offers a body that is reliable for backpacking into remote places.


Weight and Packability


This is a midweight hydration bladder weighing in at 6.90 oz. It's one of the heavier options tested, but it still feels light in your backpack. It has a wider profile that makes it a little harder to pack in narrow backpacks, but we learned that it was only super tiny running packs that the 3-L capacity did not work in.


A wide profile that isn't super complementary with narrow running packs. While we could still fit it in  its best for wider backpacks.
A wide profile that isn't super complementary with narrow running packs. While we could still fit it in, its best for wider backpacks.

Best Applications


This versatile bladder can be used for many adventures. Backpacking, day hiking, mountain biking, storing water, whatever you'd like. It's versatile because of its durable design and features that keep it in place without sloshing around (when burped properly). Since it is heavier, it's not our first choice for ultralight adventures like long trail runs, but it can certainly suffice for that function. Great bladder for whatever adventure you can conjure up!

Day hiking  running with a wider profile vest  backpacking  and more. This bladder is versatile  durable  and reliable.
Day hiking, running with a wider profile vest, backpacking, and more. This bladder is versatile, durable, and reliable.

Value


With such amazing performance on the trail and a retail price of just $40, the Platypus Big Zip is priced fairly and reasonably. We believe that this reservoir will last you for a long time (though only time will tell), making this a great value option in addition to a stand-out performer.

Conclusion


The Platypus Big Zip is our Editors' Choice winner for its durable design, high flow rate, and versatile function. It's best for backpacking, mountain biking, day hikes, and more. Unfortunately, it's not the most narrow or lightweight bladder, making it less functional for super lightweight endeavors or hydration backpacks with a narrow water pocket. In our eyes, it's one of the most versatile and reliable options out there, fulfilling the needs of most outdoor recreationalists better than its competition. It doesn't make your water taste like plastic, and the anti-microbial growth lining makes maintenance a breeze.


Amber King