Water filter straw for hikers, 4000 L

No clean water within reach while on the go—and the next source is unknown.

Anyone spending several days in the wilderness often carries liters of packaged water—unnecessary weight in their backpack. Natural streams and springs sound like a solution, but without the right equipment, the risk remains. The FlowTrek water filter straw filters up to 4,000 liters of water from natural sources through a 0.1-micron membrane—ready to drink immediately, with no pump and no waiting.

Benefits

• No more carrying heavy water supplies: Anyone who used to rely on water supplies during multi-day trips will no longer have to carry that weight—natural sources become a reliable supply of drinking water.
• No complicated setup: Thanks to the 28 mm universal thread, the straw fits standard bottles and the included collapsible bag—the switch takes seconds, not minutes.
• No worries about filter quality: The integrated pre-filter membrane removes suspended solids and particles from natural bodies of water—a backflush system extends the service life without requiring regular replacement parts.

Specifications

• Type: Portable water filter straw
• Applications: Camping, hiking, outdoor survival
• Filter capacity: Up to 4,000 liters
• Filtration level: 0.1 micron
• Thread size: 28 mm (universal thread)
• Weight: 160 g
• Straw length: 15 cm
• Straw diameter: 4 cm
• Bag capacity: 500 ml
• Color: Army green or sea blue
• Materials: Plastic, activated carbon, ultrafiltration membrane

How to Use

1. Connect: Screw the straw with the 28 mm thread directly onto a standard bottle or the included collapsible bag.
2. Filter: Suck the water from the bottle through the straw—the membrane removes suspended solids and particles as the water flows through.
3. Backflush: After use, remove the straw from the bottle neck and backflush the membrane by blowing firmly into the mouthpiece to preserve its filtering performance over the long term.

Pro tip: Backflush the straw immediately after every use in the field—this keeps the flow rate consistently high and noticeably extends the membrane’s service life, especially with cloudy spring water.