Ultralight Survival Water Filter Pen – Instant Pure Hydration
Ultralight Survival Water Filter Pen – Instant Pure Hydration
check_circle Eliminate Water Anxiety
check_circle Achieve Ultralight Freedom
check_circle Trust Triple Filtration
check_circle Built For Any Adventure
check_circle Instant Pure Hydration
- A Proud UK Business
- ✓ Limited Offer
- ✓ Free Shipping
In Stock 5 Items - Ready To Your Location

Ultralight Survival Water Filter Pen – Instant Pure Hydration
quick_reference_all
Product Overview
Product Overview
Stop letting the weight of your water supply dictate your journey. The constant search for safe sources and the anxiety of contamination can limit your freedom and peace of mind in the wild.
This isn't just a portable water filter; it's your key to unlocking true self-reliance. Transform any stream, river, or tap into a source of pure, safe hydration and explore with unburdened confidence.
Your Adventure, Redefined
Eliminate Water Anxiety
Confidently drink from freshwater sources. Our advanced survival water filter removes 99.9999% of bacteria and protozoa, giving you absolute peace of mind preparedness, from remote trails to global travels.
Achieve Ultralight Freedom
At only 50 grams, this ultralight water filter is lighter than your phone. Shed pounds from your pack, increase your agility, and extend your range without sacrificing safety. It's the ultimate upgrade for any backpacking water filter system.
Trust in Triple Filtration
Our robust system ensures every sip is clean. We don't just filter; we purify through three distinct stages for maximum safety and improved taste, providing you with instant pure hydration.
Built For Any Adventure
This isn't just for extreme expeditions. It's a practical tool for any situation where water quality is uncertain. From the trail to your emergency go bag, it provides versatile, life-saving capability.
• Backpacking & Camping: The perfect lightweight water filter for backpacking. Drink directly from streams and lakes.
• International Travel: Use it as a travel water purifier to make tap water safe in foreign hotels and villages.
• Emergency Preparedness: An essential emergency water filter for your home kit or vehicle, ensuring hydration during a crisis.
Specifications & Kit Contents
check_box
Usage Scenario
Usage Scenario
Summit Without the Weight
Ideal for: The Ultralight Backpacker & Hiker.
You've reached the alpine lake, breathless. Instead of rationing heavy water, you dip your bottle in the pristine stream, confident and unburdened.
The pen purifies it instantly. This is the freedom of a true hiking water filter, letting you explore farther and faster with complete peace of mind.
Explore with Global Confidence
Ideal for: The Adventurous World Traveler.
The tap water in the remote village market is suspect, but your curiosity isn't. You fill your bottle and purify it right at your table.
Your travel water purifier provides secure freedom, ensuring your health is never left to chance as you immerse yourself in new cultures.
Unwavering Family Preparedness
Ideal for: The Self-Reliant Homeowner.
An unexpected boil water advisory is issued. While neighbors scramble, you remain calm, knowing your family is protected and has access to clean water.
This essential tool in your emergency water filter go bag transforms any tap or rain barrel into a source of pure, safe hydration.
Stay Out on the Water Longer
Ideal for: Kayakers, Anglers, and Boaters.
You're in the middle of a vast lake, hours from shore. Instead of turning back, you simply dip your bottle over the side and refill on the spot.
Your outdoor water purifier eliminates the need to carry heavy water reserves, extending your time doing what you love with absolute confidence.
help
Frequently Ask
Frequently Ask
How much water can the Pocket-Sized Outdoor Water Purifier Pen filter?
This powerful filter has an impressive capacity, purifying up to 4,000 liters (1,056 gallons) of water. That's enough for years of adventure for a single user, ensuring long-lasting reliability on your journeys.
What types of contaminants does the triple filtration system remove?
Our advanced triple filtration system is engineered to protect you from 99.9999% of bacteria (like E. coli) and protozoa (like Giardia). It also removes large particulates like sand and silt, and reduces chlorine, heavy metals, and organic chemical matter, significantly improving taste and odor.
Is the water purifier pen truly ultralight and portable for backpacking?
Absolutely. Weighing only 1.76 ounces (50g) – lighter than most smartphones – its compact, pen-like design and integrated clip make it the ultimate ultralight solution. It fits effortlessly into any pocket, pack, or go-bag, replacing bulky water bottles.
Can this water purifier be used for international travel or only in wilderness settings?
Its versatility is a key advantage. While perfect for wilderness adventures like hiking and camping, it also serves as an excellent travel water purifier for international trips, providing safe drinking water from questionable taps or local sources, and is an essential component for any emergency preparedness kit.
What is the lifespan of the filter and how do I maintain it?
With a capacity of 4,000 liters (1,056 gallons), the filter provides extensive use. Maintenance is simple: after each use, backflush with the included cleaning syringe to remove trapped particulates, ensuring optimal flow rate and extending the filter's life. Always store it dry.
local_shipping
Free Shipping
Free Shipping
for all orders over US$60
Processing Time
Estimated Delivery
-
2-7 business days - U.S. & Canada
-
3-7 business days - EU, UK, Australia & New Zealand
-
3-8 business days - Japan, Singapore, Hong Kong & Mid-East
-
5-10 business days - Other Continental Regions
-
5-12 business days - Overseas Territories/Islands
replay
30 Days Return
30 Days Return
We accept returns within 30 days of purchase.







As Seen On




























The ByteOutdoor Standard
Every product we carry must pass the ByteOutdoor Standard. We test for real-world performance and long-term reliability, resulting in one simple promise:
Our Standard in Action
98%
of our curated products perform without failure through their first season of demanding use.
92%
of customers agree our product descriptions accurately match their real-world performance.
90%
of customers would trust a ByteOutdoor curated product for their next adventure.
Metrics from our 2025 customer survey & internal performance data.
Summer Sale Ends In
Okay, so I just got back from a week on the AT, and this little filter was a total game-changer. My old filter was bulky and a pain to clean. This pen? So tiny. It just disappeared in my side pocket. Drank straight from streams, even some muddy-looking puddles after a rain, and the water tasted… normal. No weird aftertaste, no tummy issues. My pack felt way lighter without carrying tons of bottled water. Totally recommend this to anyone looking to shave weight and not worry about water. Best thing I bought all summer.
山に持っていくフィルターを探していました。これは本当に軽い!スマホよりも軽いっていうのは本当ですね。使い方も簡単で、川の水も問題なく飲めました。味も変な感じがしない。これからはこれを持ってハイキングに行きます。
I took this on a trip to Southeast Asia. Wanted to avoid buying endless plastic water bottles, you know? It worked, definitely. I used it on hotel tap water and it tasted fine. No issues with upset stomachs, which is a big win. It's really light so it just goes into my day bag without a thought. The only reason it's not a five star is that the flow can be a bit slow if you're really thirsty. You have to suck pretty hard sometimes. But for peace of mind? Totally worth it.
Ich habe dies für mein Notfallkit gekauft. Die Idee, jederzeit trinkbares Wasser zu haben, ist beruhigend. Ich habe es mit Bachwasser in den Bergen getestet. Absolut kein Problem. Leicht zu verstauen, nimmt kaum Platz weg. Ein wirklich wichtiges Teil für die Vorsorge.
We do a lot of car camping with the kids, and sometimes we run out of bottled water faster than expected. This filter pen has been such a lifesaver. We just scoop water from the creek nearby and filter it straight into their water bottles. They think it's fun, and I feel good knowing the water is clean. It's so small, no reason not to bring it. Even my little one can use it, kinda.
- Choosing a selection results in a full page refresh.
- Opens in a new window.