Filter Straw with Foldable Water Pouch & Gravity Water Bag – Waterdrop
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Waterdrop Portable Water Filter Straw with Collapsible Water Pouch and Gravity Water Bag

  • Compatible with Waterdrop Water Filter Straw


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Key Feature

  • [Superior Performance] Waterdrop water filter straw adopts a 0.1-micron hollow fiber membrane, could effectively reduce harmful substances and bacteria in water. The adoption of high-grade coconut shell activated carbon fiber improves odor and taste, ensures water safety and delivers better drinking experience.
  • [Versatile Uses] Connects to water bags or water bottles to filter water for drinking. No need for the extra syringe to backwash. It eliminates cumbersome fittings and saves space, bringing you pure water with the greatest convenience and comfort.
  • [Outdoor Water Needs] The filter straw could fulfill all your outdoor water demands, is a nice option for hiking water filter, camping water filter and travel water filter.
  • [Large Filtration Capacity] With small frame but large filtration capacity, the portable water filter straw can provide up to 100,000 gallons of safe drinking water.

Waterdrop Portable Water Filter Straw with Collapsible Water Pouch and Gravity Water Bag

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Waterdrop Portable Water Filter Straw with Collapsible Water Pouch and Gravity Water Bag

Model number
Replacement model number
Filterstraw: Φ1.38 inches*7.09
Collapsible water pouch: 5.7 inches*10.7 inches
Gravity water bag: 8.8 inches*16.7 inches
Filtration capacity
100,000 gallons
Filter media
Activated carbon fiber

How to purify water when camping?

Boiling water is a surefire way to kill bacteria, viruses and protozoa in the water that can make you sick. But if it is not convenient for you to boil water outdoors, a water filter straw would be a perfect way to purify water when camping. It usually doesn’t take much space in your backpacking, but could remove most of the harmful substances from the outdoor water source like river, stream and etc.

What is a portable water filter straw?

Portable water filter straw is a kind of filter in a small size, which could help you drink water directly from the outdoor water source just like from a straw. It usually uses active carbon or active charcoal-based systems (and in some cases, there are unique other systems in place), so that it can reduce harmful bacteria and viruses from water. Their primary use is for cleaning water found in nature, allowing you to drink it and cook with it when you're out in the wilderness.

What is the working principle of this Waterdrop portable water filtration system?

Waterdrop filter straw adopts a 0.1-micron hollow fiber membrane, which could prevent protozoa from going through the outer walls of the tubes, while water can easily pass through them. The principle of micro-fibrous tubes is similar to that of medical dialysis technology. Therefore, water going through the filter straw will be clean and safe.

Which kind of bottle can be used with the filter straw?

The filter straw can be used with pop bottles that have a thread diameter of 27.5 mm. Therefore, to avoid leakage, it can be matched only with a mineral water bottle that has a thread diameter of 27.5 mm.

Can I use this camping water filter to filter saline water?

No, the filter should be used to filter freshwater rather than saline water.

What should you pay attention to after using Waterdrop portable water purifier?

Backwashing is essential for keeping the water filter straw in good condition and making it easy to be used for multiple times.
Do not use chemicals to clean the filter straw because they will shorten the service life of the carbon fiber filter.

How to wash portable water filter straws after use?

Generally, how to wash a portable water filter after use? After drinking, blow air through the mouthpiece frequently, or drain the water filter straw by shaking out as much water as you can. After using, remove the mouthpiece, and flush it with clean water. Cap the filter tightly after it has dried.
But, what if you use Waterdrop camping portable water filter?In addition to the general cleaning method mentioned above, our collapsible water pouch and Gravity Water Bag can be used, or a pop bottle with a standard thread diameter of 27.5mm can be filled with clean water to backwash the portable water filter.

I have used the water filter straw only once and it no longer works, why?

If the straw is not cleaned up after use, the filter element will be blocked. It should be repeatedly backwashed to remove impurities on the surface of the ultra-filtration membrane.

Why is there a peculiar smell in the second use of my portable water filter straw?

After use, dirty residues are left in the filter element. Please backwash the filter straw to remove dirty impurities on the surface of the filtration membrane. Each time before using, it should be backwashed to avoid a peculiar smell.

How to buy replacement filter straw and water bags?

Click to check out the replacement for this model set: Waterdrop water filter straw, gravity water bag, collapsible water pouch.
Smaller pore diameter
  • The smallest bacteria known in the biological world has an average length of 2 microns and a width of 0.5 microns. The Filterstraw adopts a 0.1-micron hollow fiber membrane to remove most of the common bacteria and protozoans in water.
Smaller pore diameter
Multiple ways to use
Multiple ways to use
  • A Filterstraw can accomplish all of the functions of other personal water filters because of the variety of ways it can be used. It can be connected to our collapsible water pouch and gravity water bag to filter water for drinking. Both ends can be disassembled and connected to water bags or water bottles, offering you clean drinking water anywhere you want.
Meets various outdoor water needs
  • Suitable for outdoor entertainment, hiking, camping, domestic and international travel, and emergency preparedness (tornadoes, rainstorms, earthquakes, floods, etc.); meets emergency water needs in various situations.
Meets various outdoor water needs
Easy to carry
Easy to carry
  • Waterdrop gravity-fed water bag is a flexible product made specifically with active lifestyles in mind. Simply fold it into any shape and carry it wherever you need it. It is reusable and designed to withstand long-term usage. Waterdrop collapsible water pouch is less bulky than other water bottles and can be easily carried anywhere you want.
Smaller frame but bigger capacity
  • The Filterstraw’s compact design makes it easier to carry, and it can provide up to 100,000 gallons of safe drinking water. It is easy to drink water with a Filterstraw and to quench your thirst instantly.
Smaller frame but bigger capacity
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