FiltSipy Filter Straw for Water
- Advanced 0.01μm Hollow Fibre Membrane
- Up to 5,000 Litres Capacity Per Straw
- Dual 28mm Universal Bottle Threading
- Pocket-Sized 13.5cm & BPA-Free Construction
From wild river water to crisp, purified drinking water in seconds.
The FiltSipy Filter Straw for Water features advanced 0.01μm hollow fibre ultrafiltration that filters up to 5,000 litres of natural freshwater per straw. Measuring just 13.5cm and crafted from food-grade BPA-free materials, it connects seamlessly to standard 28mm bottles or allows direct sipping from streams—delivering safe, pure hydration without pumps, chemicals, or batteries.
Without FiltSipy
- Lugging excessive kilograms of heavy bottled water on long outdoor hikes
- Constant anxiety about bacteria and micro-parasites in natural UK streams
- Enduring harsh chemical aftertastes from iodine or chlorine water tablets
- Risking dehydration when off-grid battery purifiers inevitably run flat
With FiltSipy
- Ultra-compact 13.5cm pocket-sized straw slips easily into any rucksack
- Advanced 0.01μm hollow fibre membrane filters out fine particles & microbes
- Massive 5,000L filtration capacity per straw ensures years of fresh water
- Dual 28mm threaded ends connect directly to standard bottles & pouches
Engineered for rugged outdoor exploration.
Pure, refreshing hydration straight from UK streams, lakes, and rivers.
0.01μm Hollow Fibre Ultrafiltration Membrane
FiltSipy utilizes a medical-grade hollow fibre membrane that provides a physical barrier against microorganisms and fine particles, delivering clean water instantly without chemical additives.
- Microscopic 0.01-micron pore size effectively blocks silt and microorganisms
- Instantly purifies natural freshwater without waiting for chemical reactions
- Preserves natural, refreshing taste with zero unpleasant odours
Massive 5,000-Litre Long-Life Capacity
Each durable straw filters up to 5,000 litres of clean drinking water, making it a reliable hydration solution for multi-day expeditions and emergency kits.
- Filters the equivalent of over 10,000 single-use plastic 500ml bottles
- Durable, reusable design built for years of outdoor adventures
- 2 filter straws included in the bundle for 10,000 litres combined capacity
Dual 28mm Universal Threaded Interface
Engineered with standard 28mm threads at both ends, FiltSipy screws directly onto standard water bottles and hydration bladders for unmatched trail versatility.
- Screws easily onto standard 28mm plastic bottles and soft hydration pouches
- Allows direct sipping from natural sources or squeeze filtration into pots
- Hygienic end caps keep the mouthpiece clean and leak-free on the move
Pocket-Sized 13.5cm BPA-Free Ultralight Design
Crafted from durable, food-grade BPA-free materials, FiltSipy fits neatly into pockets and running vests without adding bulk or noticeable weight.
- Compact 13.5cm body stows effortlessly into jacket pockets or bug-out bags
- 100% BPA-free and food-grade construction for safe, daily outdoor use
- Includes tactical clip and neck lanyard for rapid on-trail access
Instant clean water in 3 simple steps.
No batteries, no awkward pump handles, and no waiting. FiltSipy turns wild freshwater into drinkable water immediately.
Connect or Submerge
Dip the base directly into any freshwater stream, or screw it onto a standard 28mm water bottle or hydration bladder.
Sip Crisp Water
Draw water gently through the mouthpiece. The 0.01μm hollow fibre membrane instantly removes particulates and microbes as you drink.
Backwash & Pack
Simply blow back through the mouthpiece to clear remaining water and debris, replace the dust caps, and pack away into your rucksack.
See FiltSipy in action.
FiltSipy Filter Straw for Water
0.01μm Hollow Fibre, 5,000L Capacity & Dual 28mm Thread
- Advanced 0.01μm Hollow Fibre Membrane
- Up to 5,000 Litres Capacity Per Straw
- Dual 28mm Universal Bottle Threading
- Pocket-Sized 13.5cm & BPA-Free Construction
Why UK adventurers choose FiltSipy.
See how FiltSipy outperforms chemical purification tablets and bulky bottled water with ultra-fine 0.01μm physical membrane filtration.
Based on 1,840+ verified UK reviews
Based on verified UK purchases
Tap to view full size
"An absolute game-changer for walking in the Lake District. I drank straight from mountain streams and tarns without a second thought. The water tasted crisp and fresh, and my rucksack was so much lighter!"
"Took these on a 4-day wild camping trek across the Scottish Highlands. Screws straight onto standard water bottles effortlessly. Fast flow rate and zero plastic or chemical taste. Brilliant value with the 2-pack."
"Kept one in my car glovebox and one in my day rucksack. The 0.01μm filtration gives total peace of mind on long countryside trails in the Peak District. Exceptional quality and super lightweight."
30-Day Pure Hydration Guarantee
We are confident that FiltSipy will be your most dependable outdoor gear companion. If you are not completely satisfied with its water filtration performance within 30 days of delivery, we will issue a prompt 100% refund—no hassle, no fuss.
Frequently Asked Questions
Ready for safe, pure hydration on every outdoor journey?
Join thousands of UK hikers, campers, and adventurers drinking clean, safe water anywhere. Claim your 50% discount 2-pack bundle today.
Claim Your 50% Off 2-Pack Now