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Quick summary
- A compact gravity-fed water purification system.
- Filters water using a 5-stage process to improve safety and taste.
- Includes a 1.5 gal (5.7 L) gravity bag and a backwashable ultrafiltration straw.
What problem it solves
- Cuts your need to carry heavy bottled water on trips.
- Makes cloudy, bad-tasting, or chemically-treated water drinkable.
- Gives fast, reliable access to potable water during outdoor adventures and emergencies.
5-Stage Filtration for safer, better-tasting water
- Coconut shell activated carbon removes chlorine and bad taste/odor.
- 0.1 µm ultrafiltration membrane and other filter media reduce particulates, sediment, sand and dirt.
- Result: clearer, fresher-tasting water you can trust for drinking.
Big capacity for all-day use
- 1.5 gallon (5.7 L) gravity bag holds about 11 × 500 ml bottles.
- Perfect for a day hike, camp cooking, or family emergency use.
Fast flow and long life
- Maximum flow up to 700 ml/min — fills a 500 ml bottle in under 1 minute at peak flow.
- Filter lifespan up to 1,400 gallons (5,300 L) — equivalent to thousands of 500 ml bottles.
- Saves time and reduces waste from disposable bottles.
Backwashable and recyclable
- Innovative backwash function keeps the straw clean and restores flow.
- Easily remove the mouthpiece and rinse with clean water when flow slows.
- Designed for safe, repeated use without introducing contaminants.
Easy, versatile connections
- Works with the included gravity bag or with bottles.
- Both ends are disassemblable to connect to standard gear.
- Compatible with threaded bottles that have a 27.5 mm neck.
Who this is for
- Hikers and backpackers who need a lightweight drinking solution.
- Campers and travelers who want clean water without hauling bottles.
- Emergency preppers who need reliable water during storms, earthquakes or floods.
- Anyone who wants a fast, long-lasting, reusable water filter straw.
Why choose this product?
- Reliable multi-stage filtration improves safety and taste.
- Large gravity bag meets daily outdoor water needs.
- Fast flow rate saves time on the trail.
- Long lifespan replaces thousands of single-use bottles.
- Backwashable design keeps the filter working longer.
- Simple setup and broad compatibility with bottles and bags.
How to use (quick)
1. Fill the 1.5 gal gravity bag with source water.
2. Hang the bag, open the drainage valve to purge air from the hose.
3. Connect the straw. Drink directly or fill your bottle.
4. If flow slows, remove mouthpiece and backwash with clean water.
Key specs
- Filtration: 5-stage, coconut shell activated carbon + 0.1 µm ultrafiltration membrane.
- Bag capacity: 1.5 gal (5.7 L).
- Filter life: up to 1,400 gallons (5,300 L).
- Max flow: up to 700 ml/min.
- Bottle thread compatibility: 27.5 mm.
Short, practical, and travel-ready. The Waterdrop Gravity Water Filter Straw gives fast access to cleaner, better-tasting water wherever you go.
