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Model: WD-FSBUL
Capacity:The Waterdrop gravity water filter straw system can provide 1,400 gallons/one straw of safe drinking water.
The maximum capacity can be reached 100,000 gallons by backwashing to purifier the straw.
The Waterdrop gravity water bag can hold up to 1.5 Gallons of water at a time.
5-Stage Filtration: Made from selected filtration materials, the 0.1 um fiber membrane of the gravity water filter straw can reduce most harmful substances in water to ensure the safety of every drop of outdoor drinking water.
Applicable Scenes: Camping, travel, hiking, boating, fishing, rock climbing and biking.
Well-chosen filtration materials
With adoption of high-quality coconut shell activated carbon, the inside filtration layers of the water filter straw have higher adsorption capability, and can effectively remove bad odor and improve the taste; the 0.1 micron fiber membrane of the water filter straw can reduce most harmful substances in water to ensure the safety of each drop of outdoor drinking water.
Smaller frame, bigger capacity
The water filter straw is well-designed and small in size. Each water filter straw can provide 1,400 gallons of purified water at most, accompanying you to enjoy each outdoor activity and providing purified water for you anytime anywhere.
Perfect combination, light weight and portable design
The water filter straw can be matched with the collapsible gravity water bag, thereby perfectly meeting outdoor demands for water filtration and drinking. Meanwhile, the combination weighs only 0.48 pounds and can be directly stored on one side of a backpack without any burden.
Alaskan Karl K
Reviewed in the United States on March 10, 2025
This is a high quality easy to use water filter. No pumping, just fill and use gravity to filter water. When empty it’s pretty small and packable. When full it holds a good amount of water but is still easy to hang on a branch or hook. There are no stinky plastic smells when you open the lid on the bladder. Good to have and decent price.
Alex
Reviewed in the United States on January 19, 2025
I haven’t had a chance to test this in the field, but I filled it up about halfway just to make sure it works. It’s perfect. No leaks and the water filtered a lot faster than I expected. It took less than a minute for the half filled bag to filter. As a bonus it’s fits perfectly with my membrane solutions water filters that I already
Helaas ,na 3 keer opladen kapot
Reviewed in the Netherlands on January 16, 2025
Hopelijk zal ik dit nooit weten. Heb het nl aangeschaft ipv nood. Ligt wel op een goed bereikbare plaats. Ook nu weer prima levering
PaigeR
Reviewed in Canada on January 11, 2025
Me and my boyfriend take this with us backpacking and we love it. We fill it and then hang it up on a branch and boom clean water and no more hand cramps from pumping. It’s super easy to set up, and the stream is light but it’s still quick. We haven’t had to change the filter yet but we’ve taken it 3 times so far and it’s pretty clean.Just be cautious when storing it in your backpack/bag to not let anything puncture it or bend the straw since it’s kinda thin.Otherwise this was a great purchase!
DDinNTK
Reviewed in the United States on September 30, 2024
It drives me nuts when these filters are three times as expensive since you are really just paying for the filter. I was apprehensive because I hadn’t heard of this brand and it was so reasonably priced. After 4 days in the backcountry, I was thrilled with how well it did. My only minor quibble is that is would be way easier to have a quick connect between the hose and the filter. Pulling that off and on was a hassle. Other than that, it was flawless.And worth mentioning, the customer service is outstanding! I lost the hose and sent customer service and email to see if they sell replacements. They immediately got back to me and sent one out free of charge. Very happy customer here!
Chef Nasty
Reviewed in the United States on September 25, 2024
Used this for the first time in the Boundary Waters NE of Ely, MN where store-bought fresh drinking water is hours away. Wilderness. This system functioned flawlessly. Although the water in those lakes is some of the cleanest in the US, we filtered 4 days worth through this filter. Odorless, colorless, and tasteless. This system works absolutely flawless. Don't look anywhere else. This is what you want. (Can see it hanging from the tree in the left of the picture). Probably ran 10 bags of a gallon and a half each through it. It's almost weightless to carry, water quality is 100%, and it's about as easy to use as they get. Zero flaws.
BWarren
Reviewed in the United States on September 18, 2024
Seems to be a very good filter, for my purposes. Make sure to follow the instructions and it as advertised. Takes me about 30 minutes to filter one gallon. A little slower than I thought it would be but if it’s filtering properly that’s okay for my purposes.
Anton
Reviewed in the Netherlands on September 11, 2024
Micro zwaartekracht filter of zo uit de fles.Filtert 0.1 um dus water uit de natuur wordt goed gefilterd, water met chloor zoals in Engeland uit de kraan behoeft ook een koolstof filter welke ikzelf er nog tussen ga plaatsen.
Gianmarco Mancini
Reviewed in Italy on August 21, 2024
Leggera
Lawrence
Reviewed in the United Kingdom on December 18, 2024
Great product, already packed ready for my next adventure and these things are excellent and life savers. Ordered and came promptly so thank you.
Eric Gunnison
Reviewed in the United States on December 1, 2024
The Waterdrop Gravity Water Filter Straw is for my survival kit. I just ran a quart of water through it and I am impressed. It ran through the system a lot quicker than I thought it would. good investment.
Craig Barshinger
Reviewed in the United States on August 25, 2023
I love this product because it has a 1.5 gallon bag that is easy to fill in one second from a lake, pond, river, spring. It's a few ounces heavier than some of the other ultrafiltration options, but it is sooo worth it. After all, at camp you are going to need more than 32 oz of filtered water per day! 1.5 gallons is much more reasonable, and you only have to fetch water once per day. You just scoop up 1.5 gallons, roll the top shut, then sling it over your shoulder as you walk back to camp. Then the water gravity feeds from the bag, through the filter, into either the provided drinking sack, or any container you provide. It's easy to use and the provided directions are clear.About the customer service: The first one I got had a manufacturing defect. the little gray plastic elbow that connects the 1.5 gal bag to the hose was blocked, probably due to flashing left over from the manufacturing process. I emailed Waterdrop Filter and they sent me a new one immediately and without hassle. This was wonderful. (I failed to try out the product prior to backpacking, and so discovered the blockage on the trail. Note to self: always try out gear at home before setting out.)This is the kind of customer service that makes me a fan. Sure, there will be problems. But when a company stands behind its product, I stand up for the company.I contrast this customer service with another Amazon purchase from a well-known company that sold a bladder that had a manufacturing defect. I wrote them a detailed email. Got an auto-reply promising 3-5 day response. About 9 days later I got an email, telling me to fill out a warranty claim form, etc, etc. The reply didn't even address the diagnostic data I provided. My confidence in the product sank. What did I do? I returned the product to Amazon. Thank goodness for the 30-day Amazon return policy!But back to Waterdrop: They stood behind the product and supported it. In this day and age of increasingly high technology, product support becomes as important as the product itself.
Outdoorjunkie73
Reviewed in the United States on July 6, 2021
This water filter was awesome easy and light weight to carry on a week long trip with my daughter on Isle Royale. There are only a cpl places on the island to get drinking water off tap, you must have filters to get drinking water when back country.Packed easily into my bag, and allowed us to carry 2, 24 oz “Smart Water” sport bottles ea. Didn’t even touch our Sawyer Mini filters we’d taken as back up.Bag opening is easy to fill and close. Only issue, when bag is rolled closed it was not totally leak proof. Awareness to watch for drips into clean water.The bag/filter when hung, provided full 20 oz bottles in short time, maybe two mins to fill our bottles. Cleaned each day as directed. Remember the bag provided for cleaning! We had no issues at all. Took a little bit of space as it’s a rubber bag with long tube with a filter that is for sure longer than a Sawyer filter. Function and provided fast, clean water with ease. beat any space/weight concerns I had initially.Clean, clear water that had no taste issues at all. Pulled water from Lk. Superior and multiple inland lakes. Never an issue and flavor never a problem. Seemed clearer then the tap from Rock Harbor.Awesome product, for sure recommend. Filters are rather large, note the specs given from manufacture. Just be aware of space it does take up. We had no issues even with carrying Swayer minis as back ups. We never used them.5 nights, 45 miles wandered.Thanks for keeping us with healthy, clean water.
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