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How it works>>
Fill from any freshwater source — a stream, a lake, a river. Give it a gentle squeeze.
Clean water flows out instantly at 18ml/s. No pumping. No waiting. Just clean water, on demand.
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OASSAY supports backflushing, helping you clear debris from the filter and maintain reliable performance over time.
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The filter head can also be used separately with a standard water bottle or a drinking tube.
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Our titanium cup uses the same nano-ceramic coating as the Olympic torch — heat it over open flame, it won't chip or fade.
Why we built OASSAY
Including E.coli, Salmonella, Giardia and Cryptosporidium.
Data tested by SGS
FlexFlow Pro Series
High-Speed Flow
BPA-Free
99.999% filtration
FlexFlow Pro Outdoor Water Fitler (Standard)
$79.00 USD
Unit price
Regular price
per
The OASSAY FlexFlow Pro Purification System is a versatile, high-performance water filtration solution designed for outdoor enthusiasts, travelers, and everyday use. Combining advanced dual-stage filtration with modular adaptability, it delivers safe, great-tasting water from lakes, streams, or taps.
Its unique cup-head design allows standalone use or integration with standard bottles and hydration systems.
Cartridge Included.
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Specifications:
Filtration Capacity：Up to 500L (with proper maintenance; actual lifespan depends on water quality).
Filter Layers：Stage 1: NanoFlex Carbon ｜ Stage 2: 0.1μm Hollow Fiber Membrane
Flow Rate: 15-18 ml/sec
Filtration Efficiency: Official Tests from SGS show that the OASSAY FlexFlow Series Filtration Cartridge removes 99.999% of bacteria, and 99.99% of microplastics. (Data tested by SGS)
Made of Tritan / Food-Grade Silicone
Pre Order
Pre Order
OASSAY FlexFlow Pro Water Filter Bottle（Titanium） - Advanced Portable Filtration for Outdoor & Travel
$109.00 USD
Unit price
Regular price
per
OASSAY FlexFlow Pro Water Filter Cup - Advanced Portable Filtration for Outdoor & Travel
The OASSAY FlexFlow Pro Purification System is a versatile, high-performance water filtration solution designed for outdoor enthusiasts, travelers, and everyday use. Combining advanced dual-stage filtration with modular adaptability, it delivers safe, great-tasting water from lakes, streams, or taps.
Its unique cup-head design allows standalone use or integration with standard bottles and hydration systems.
Cartridge Included.
-----
Specifications:
Filtration Capacity：Up to 500L (with proper maintenance; actual lifespan depends on water quality).
Filter Layers：Stage 1: NanoFlex Carbon ｜ Stage 2: 0.1μm Hollow Fiber Membrane
Flow Rate: 15-18 ml/sec
Filtration Efficiency: Official Tests from SGS show that the OASSAY FlexFlow Series Filtration Cartridge removes 99.999% of bacteria and 99.99% of microplastics. (Data tested by SGS)
Made of Tritan / Food-Grade Silicone / Titanium
Pre Order
Pre Order
Trusted by Real Reviews
@Build The Dream
"I can just put close it up and drink. This is so much better than some sort of straw or anything like that."
@Louie Seddon
"It's lightweight simple to use and built for adventures on the move."
@Outdoors Survival Hub
"It's perfect for bushcraft, camping, hiking, and survival situations."
@The Survival Outpost
"From clean wilderness creeks to the dirtiest urban water sources. Oassay FlexFlow performs in true survival conditions."
@Neil Begasa
"Whether it's for hiking, travel, or daily use, this bottle is designed to go where you go."
@Chloe
"This OASSAY bottle allows you to drink water from ANYWHERE!"
Testimonial
from our
verified users
"I've been part of a number of Kickstarters over the years. Rarely does anyone get it exactly right the first time, but I think that should be expected. What I didn't expect in this project was how amazingly responsive, friendly and proactive the people behind it have been — they've answered all my questions, always gone above and beyond to provide more information than I asked for, and gone the extra mile to fix any issues that arose.Usually I'm reluctant to back something on Kickstarter, but I'd back another Oassay project in a heartbeat! "
@Trevor R
verified user
"Received my Filters and bottle in Los Angeles, California today. Items have high quality appearance. Looking forward to using the filtering feature in the future. Thank you very much Oassay for creating such a wonderful product."
@Alvaro Peralta
verified user
"Thank you for the update! I've been using it for about a month now, and so far everything has been running smoothly. I’m happy with it😊.It’s nice to know that my product will be covered if any issues come up in the future, I really appreciate it, you guys have done a good job."
@Arthur
verified user
"All that is said here is true! Caroline as the front person, has been transparent & honest & the after sales is amazing.
If the team says something is so, you can believe it!"
@Peter Hamburger
verified user
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FLEXFLOW PRO
GO
Our warranty policy is 2 years for all products.
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If anything goes wrong with your OASSAY within 2 years, we'll replace the part or the entire product. No questions asked.
We built OASSAY to last. And we stand behind it.
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