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Platypus
Big Zip EVO Reservoir

3.634920634920635 out of 5 stars
63 Reviews
$49.95
Color:One Color

Size:

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Big Zip EVO Reservoir

Offering a faster-than-ever flow rate and the same taste-free hydration you've come to expect from Platypus, the Big Zip EVO reservoir has your back on hot days of outdoor adventuring. Whether you're hiking to your local lookout or mountain biking your favorite trails, the improved flow rate and self-sealing Bite Valve valve make it easy to get hydration when you need it, while the leak-proof shutoff valve, handy grip, and secure SlideLock make it easy to operate. Plus, thanks to Platypus' clean taste guarantee, along with embedded Silver-ion to keep away mold and bacteria, you can have peace of mind as you hydrate yourself on countless adventures.


Details

  • Hydration reservoir with a clean taste and quick flow rate
  • Self-sealing bite valve improves flow for more effective hydration
  • Silver-ion treatment protects clean water from mold and bacteria
  • Leak-proof shutoff valve prevents leaking in your pack
  • Sliding lock and one-handed pincher grip make it easy to fill
  • Item #CAS00FO
Material
polyurethane, polyethylene
Volume
1.5L, 2L, 3L
Valve
silicone
Dimensions
[1.5L] 13 x 8.5in, [2L] 15 x 8.7in, [3L] 17.2 x 9in
Claimed Weight
[1.5L] 5.6oz, [2L] 6oz, [3L] 6.5oz
Manufacturer Warranty
limited

Overall Rating

3.5 based on 63 ratings

Review Summary

1 Stars - 11 reviews
2 Stars - 5 reviews
3 Stars - 11 reviews
4 Stars - 5 reviews
5 Stars - 31 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

What do you think about this product?

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3 out of 5 stars

June 16, 2024

It's okay

I like the pouch filling it was a little hard and I wish it had the magnetic clip for your bag instead of the plastic one

Ruth J.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

1 out of 5 stars

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.

Chris B.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

3 out of 5 stars

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.

Amber
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

November 9, 2023

Big Zip 3 liter Bladder

This is my 2nd one. Finished the AT with my first one in 2012. Still working but time for a clean bladder. Backpacked with it this summer and still love it as much as I did on the AT!

Dianne M.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

2 out of 5 stars

October 28, 2023

Some great features but one major design flaw

No plastic water taste, great flow and awesome improvement on the bite valve BUT water stays in the fixed hose on the back after you’re done using it and it’s a pain to get the water out so it doesn’t get too funky. The old version had the hose valve at the bottom which never allowed water to sit unless you left the hose on. I wish you guys made the old version with the new bite valve, that would be the magic recipe.

user image
Steve P.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

October 27, 2023

Great design and durability

Flow is great, ease of filling is awesome, like the water tube attachment and fits well in my pack.

Eric M.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

4 out of 5 stars

October 26, 2023

Universal attachments, wide opening.

Serves its purpose. I like the big zip for the wide top opening. Flow is fine if hose doesn’t get kinked even with MSR thrulink attached. 4 stars as it could be lighter and is on the heavier side of bladders if you are concerned about every ounce of weight. I would still choose this option over the Hoser bladder as these connections are all universal attachments for other brands.

Colton W.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

1 out of 5 stars

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?

John
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

September 27, 2023

It works exactly as advertised

It works exactly as advertised no bad taste and no leaking.

Wesley H.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

4 out of 5 stars

September 15, 2023

Easy to use

I’ve only had a chance to use it once so far but enjoyed the fast water flow and how easy it was to fill up. Seems much sturdier than it’s previous

Valerie V.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site