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Platypus Big Zip EVO Drinking Reservoir (2L)
Platypus Big Zip EVO Drinking Reservoir (2L)
Platypus Big Zip EVO Drinking Reservoir (2L)
Platypus Big Zip EVO Drinking Reservoir (2L)
Platypus Big Zip EVO Drinking Reservoir (2L)
Platypus Big Zip EVO Drinking Reservoir (2L)

Platypus Big Zip EVO Drinking Reservoir (2L)

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Platypus Big Zip EVO Hydration Bladder - 2L Premium taste-free hydration reservoir with 50% faster flow rate.

Introducing the Big Zip™ EVO—the latest evolution in taste-free hydration. The Big Zip EVO delivers a significantly higher flow rate than previous Platypus reservoirs and a host of new features, making it a great option for backpackers, hikers, and mountain bikers. 


  • Secure SlideLock™: Slides both directions to easily open, securely close and fill reservoir.
  • Handy Pincher Grip: Allows for easy one-handed filling.
  • High Mount Quick-disconnect: Fast, easy access - no more digging down in your pack.
  • Leak-proof Shut-off Valve: Instantly stops flow and offers reliable stowing.
  • Semi-rigid Centre Baffle: Offers low-profile support and makes for easy cleaning and drying.
  • HyFLO™ Self-sealing Bite Valve: Improves flow along with new, larger 5/16" drink tube.
  • Funk-free: Embedded Silver-ion protects clean water from mould & bacteria.
  • Pure Platy Experience: All materials are certified taste-free, BPA-free, BPS-free, and phthalate-free.


How do I clean my hydration system?
Hand wash your hydration system using warm or hot soapy water. Using the Platypus Cleaning Kit helps access tough to reach places.

For deeper cleaning:

  1. Per litre volume of your hydration system, add ¼ Cup of baking soda to ¾ Cup of water and shake for 30 seconds (e.g., for a 2L hydration system use ½ Cup of baking soda with 1 ½ Cup water).
  2. Add ¼ Cup lemon juice per litre, close and shake 10 seconds, then vent by opening hydration system away from face.
  3. Re-seal hydration system and repeat shaking and venting three times. Expel as much air as possible, close hydration system, and soak for 20 minutes.
  4. Dump solution and rinse hydration system three times with hot water.
  5. Caution: When adding lemon juice to baking soda, effervescence occurs and will cause pressure to build in a closed Platypus product.

How do I dry my hydration reservoir?
In general, it is optimal to prop or hang hydration system reservoirs upright to dry—this allows moisture to evaporate and escape upward.

Drying Big Zip™ reservoirs is easy. First, wipe interior with a dry towel (made easy thanks to the large opening!). Then prop the reservoir open with the SlideLock™ slider and let it all air dry.

Another great way to dry a hydration system is with a plastic bag dryer, widely available at kitchen supply stores and numerous online retailers.

Is it okay to freeze my hydration reservoir with water in it?
Yes. To do this, add water to your reservoir, being careful to not over-fill (fill no more than ¾ full—water expands as it freezes; it can burst your reservoir if you over-fill it). Purge all air and then lay your reservoir flat in the freezer overnight. Remove and enjoy a steady source of cold, refreshing hydration as the water melts!

Also, did you know that you can occasionally skip cleaning your reservoir by storing it in the freezer? It’s as simple as rinsing the whole system with fresh water, then placing it in the freezer until the next use.


  • Capacity: 70 fl. oz/2 litres
  • Weight: 6 oz/0.17 kg
  • Width: 8.7 in/22.1 cm
  • Length: 15.0 in/38.1 cm
  • Film: Polyurethane / Polyethylene
  • Bite valve material: Silicone
  • Country of Origin: Made in the U.S.A. of U.S. and Imported Materials

We also carry some spare parts for your Platypus Water Bladders which you can find here!

Platypus Big Zip EVO Drinking Reservoir 2L 10858