portable water filter bottle filter
AlkaWay OKO Replacement Filter
$19.00 inc. GST Add to cart

AlkaWay OKO Replacement Filter

$19.00 inc. GST

  • NASA-derived technology
  • Fits both 650 mL and 1-litre ÖKO bottles
  • BPA free
  • Lab-tested to remove 99.99% of Cryptosporidium and Giardia Lamblia
  • Each filter has a life of 380 litres
  • Filter Colour: Red, Blue, Green (if you leave a comment in the order notes during checkout, we will send you the colour you want)

For ÖKO Water Filter Bottle, follow this link (OKO Water filter bottle).

ÖKO recommendation – Review country water safety table – PDF

(19 customer reviews)

OKO Replacement Filters

Oko Replacement filters for the AlkaWay ÖKO Water Bottle, for both the 650ml and 1000ml versions.

Originally developed for NASA and used in the ISS (International Space Station). We convert the material for consumer use in our bottles. Simply put, it is the state-of-the-art in water filtration technology.

In addition to a 2-micron pore size, the material utilizes a positively charged electro-adsorption (attraction and retention) process to draw and trap harmful agents much smaller than its pore size. Charge fields, activated upon water contact extend 1 micron each to virtually close the pore to any intruding agents. The OKO Replacement Filter level-2 filter lab tests using NSF/ANSI Standard 53 reflect the removal of 99.994% of e-coli, 99.9999% of cryptosporidium, and giardia lamblia, the most commonly found bacteria and microorganisms in lakes, streams and international water sources. A stack of over 400 such pores in the 0.8mm thickness of the filter creates a “tortuous path” which a harmful agent would have to travel through in order to make it across the filter membrane.

19 reviews for AlkaWay OKO Replacement Filter

Based on 19 reviews
  1. Donna (verified owner)

  2. Anonymous (verified owner)

  3. Lorraine (verified owner)

    Good rating very efficient

  4. Brenda Holliday (verified owner)


    Too expensive


    Too expensive


    Too expensive


    Too expensive


    Too expensive

  10. Denise S. (verified owner)

  11. Anonymous (verified owner)

    Reasonable price and good delivery service

  12. Linda (verified owner)

    Easy to order, fast and efficient delivery. Thank you

  13. David Shea (verified owner)

    Your service was really good. You made up for the rubbish service provided by fastway couriers who couldn’t be bothered to deliver the filters. Thanks for sending a second set out by Aus post that did get to me! thanks

  14. Stuart A. (verified owner)

    Great products and quick delivery.

  15. Leonie (verified owner)

    Quick and easy supply and delivery

  16. Thespina (verified owner)

  17. Scott Weaver (verified owner)

  18. Derek (verified owner)

    Filters are awesome and easy to install, still easy but now clogging up after only 200 + refills

  19. Brenda (verified owner)

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