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No need to set up, super easy to use.
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.
Trusted by Data
Including E.coli, Salmonella, Giardia and Cryptosporidium.
Data tested by SGS
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FlexFlow Pro Lite
$79.00 USD
Unit price
Regular price
per
🧳 Lightweight & Compact
✈️ Perfect for Travel
💧 Squeeze & Drink Instantly
Lightweight squeeze filtration for travel and everyday exploration.
The OASSAY FlexFlow Pro Filtration 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
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Filtration Efficiency: Official Tests from SGS show that the OASSAY FlexFlow Series Filtration Cartridge removes
✅ 99.999% of bacteria
✅ 99.99% of microplastics
Made of Tritan / Food-Grade Silicone
Pre Order
Pre Order
FlexFlow Pro Titan
$109.00 USD
Unit price
Regular price
per
🔥 Fire-Safe Titanium Cup
🏔 Built for Serious Outdoor Exploration
🤝 Heat, Share & Rehydrate
Outdoor-grade squeeze filtration with detachable titanium cup
The OASSAY FlexFlow Pro Filtration 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
✅99.99% of microplastics
Made of Tritan / Food-Grade Silicone / Titanium
Pre Order
Pre Order
Why We Built OASSAY
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!"
FlexFlow Pro Titan
🔥 Fire-Safe Titanium Cup
🏔 Built for Serious Outdoor Exploration
🤝 Heat, Share & Rehydrate
Outdoor-grade squeeze filtration with detachable titanium cup
The OASSAY FlexFlow Pro Filtration 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
✅99.99% of microplastics
Made of Tritan / Food-Grade Silicone / Titanium
$109.00 USD
Unit price
Regular price
per
Color
Moss Green
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
FLEXFLOW PRO
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Bacteria Filtration Rate
+
Microplastics Removal Rate
+
Bacteria Filtration Rate
+
Microplastics Removal Rate
+
Flow Rate Test for Turbid Water Filtration
(With vs. Without Backwashing)
(With vs. Without Backwashing)
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.