--- product_id: 211870133 title: "Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 5 Stage Filtration, Pack of 1" brand: "waterdrop" price: "$82.34" currency: USD in_stock: true reviews_count: 13 category: "Waterdrop" url: https://www.desertcart.us/products/211870133-gravity-water-filter-straw-camping-water-filtration-system-water-purifier store_origin: US region: United States of America --- # 1.5 gal capacity 700 ml/min flow rate 5-stage ultrafiltration Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 5 Stage Filtration, Pack of 1 **Brand:** waterdrop **Price:** $82.34 **Availability:** ✅ In Stock ## Summary > 💦 Stay hydrated, stay ahead—filter your adventure with Waterdrop! ## Quick Answers - **What is this?** Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 5 Stage Filtration, Pack of 1 by waterdrop - **How much does it cost?** $82.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/211870133-gravity-water-filter-straw-camping-water-filtration-system-water-purifier) ## Best For - waterdrop enthusiasts ## Why This Product - Trusted waterdrop brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Fast Flow, No Fuss:** Up to 700 ml/min flow rate means less waiting, more adventuring. - • **Built to Last & Reuse:** Backwashable filter extends lifespan up to 1,400 gallons—eco-friendly and budget-smart. - • **Carry More, Worry Less:** 1.5-gallon gravity-fed bag holds enough water to keep you hydrated all day on the trail. - • **Versatile & Lightweight:** Connects easily to bottles or bags; compact design fits perfectly in any backpack. - • **Pure Hydration On-Demand:** 5-stage ultrafiltration removes chlorine, sediment, and odors for crisp, clean water anywhere. ## Overview The Waterdrop Gravity Water Filter Straw is a professional-grade, 5-stage ultrafiltration system designed for camping, backpacking, and emergency preparedness. Featuring a 1.5-gallon gravity-fed water bag and a durable, backwashable filter with a 700 ml/min flow rate, it delivers safe, great-tasting water by removing harmful contaminants. Lightweight and versatile, it supports multiple water sources and offers up to 1,400 gallons of purified water, making it an essential companion for millennial outdoor enthusiasts who demand efficiency and reliability. ## Description Product description 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 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. ## Features - 5-Stage Efficient Filtration: With adoption of premium-quality 0.1 um ultrafiltration membrane and other raw materials, the Water Filter Straw can effectively reduce harmful substances like chlorine, particulates, sediment, stones, sand, dirt, bad taste &odor in water to ensure the water safety and deliver better drinking experience. - Professional Combination: Waterdrop Gravity Water Filter Straw with 1.5 gal Gravity-Fed Water Bag is an exclusive water purification combination created for outdoor activities and first aid survival. The large-capacity water bag can hold up to 1.5 Gallons of water at a time, which is about 11 bottles of 500 ml bottled purified water, and can meet the all-day demand for outdoor water drinking. - Longer Lifespan: The Waterdrop Filter straw can provide safe drinking water up to 1,400 gallons (5,300 liters), and ensures the maximum water flow rate of up to 700 ml/min to provide more relaxed outdoor water drinking experience. - Recyclable Straw: With innovative backwash purifier function, the inside of the Water Filter Straw can be kept clean at all times and it is recyclable, safe and pollution-free. If the water flow decreases or the filter has been used for a long time, you can remove the mouthpiece, flush it with clean water. (Standard water bag can be used or pop bottle with thread diameter of 27.5mm can be filled clean water for backwashing the filter straw.) - Versatile Uses: The Water Filter Straw can be connected with water bags or water bottles to filter water for drinking. Both ends of it can be disassembled and connected with the water bags and the water bottles to offer you clean drinking water anytime anywhere. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B086QNLBB4 | | Best Sellers Rank | #1,932 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #8 in Camping & Hiking Water Filters | | Brand | Waterdrop | | Brand Name | Waterdrop | | Capacity | 1.5 Gallons | | Container Type | Bag | | Customer Reviews | 4.6 out of 5 stars 3,511 Reviews | | Included Components | Water Filter Straw *1, 1.5 Gal Gravity-Fed Water Bag *1, 16 oz Water Pouch *1 | | Installation Type | Freestanding | | Item Weight | 0.29 Pounds | | Manufacturer | Waterdrop | | Material | Hollow Fiber Ultrafiltration Membrane | | Material Type | Hollow Fiber Ultrafiltration Membrane | | Maximum Flow Rate | 700 Milliliters Per Minute | | Model Name | WD-FSBUL | | Model Number | WD-FSBUL-1 | | Other Special Features of the Product | Gravity Water Filter Straw, Water Purifier Survival | | Package Information | Bag | | Part Number | WD-FSBUL-1 | | Power Source | Non Electric | | Purification Method | Hollow Fiber Ultrafiltration Membrane | | Special Feature | Gravity Water Filter Straw, Water Purifier Survival | | Supported Water TDS Level Maximum (PPM) | 300 | | UPC | 840814172988 | | Unit Count | 1.0 Count | | Warranty Description | 30 days limited filter warranty - Any part of the water filter which fails due to a defect in materials or workmanship during this limited 30-day warranty. | ## Product Details - **Brand:** Waterdrop - **Capacity:** 1.5 Gallons - **Included Components:** Water Filter Straw *1, 1.5 Gal Gravity-Fed Water Bag *1, 16 oz Water Pouch *1 - **Installation Type:** Freestanding - **Item Weight:** 4.64 ounces - **Material:** Hollow Fiber Ultrafiltration Membrane - **Package Information:** Bag - **Power Source:** Non Electric - **Purification Method:** Hollow Fiber Ultrafiltration Membrane - **Special Feature:** Gravity Water Filter Straw, Water Purifier Survival ## Images ![Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 5 Stage Filtration, Pack of 1 - Image 1](https://m.media-amazon.com/images/I/61QubWlo4gL.jpg) ![Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 5 Stage Filtration, Pack of 1 - Image 2](https://m.media-amazon.com/images/I/81ZCtN3mmDL.jpg) ![Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 5 Stage Filtration, Pack of 1 - Image 3](https://m.media-amazon.com/images/I/71uSFE33GtL.jpg) ![Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 5 Stage Filtration, Pack of 1 - Image 4](https://m.media-amazon.com/images/I/81RI4O90YVL.jpg) ![Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 5 Stage Filtration, Pack of 1 - Image 5](https://m.media-amazon.com/images/I/71l7DrdMZIL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: does it protect against Giardia lamblia? Thanks** A: Yes **Q: How much does this weigh?** A: Hi Shawn, Thank you so much for your interest in our product. The item's gross weight is 1.09 pounds. If you have any other inquiries, please feel free to contact us at 1-888-352-3558 (8:00 AM - 5:00 PM PST, Mon - Fri). Thank you. Kind Regards Mia Lauren Customer Service Rep **Q: how long does this product last? 1 day? 1 month?** A: I used it for the first time this weekend. On a backpacking trip. I thought it was useful to have in addition to a filter pump to bring water back to Camp. It seemed well-made, how long it will last Would probably depend on how dirty the water is that you put through it ,if you clean it consistently and if you were careful not to abuse it. But I will get $20 worth of use out of it for sure. I expect it to last me for multiple trips. **Q: Does it come with the bag?** A: Hi Mike, Thank you for your interest in our Water Filter Straw. Yes, the item comes with two bags. One is the blue gravity water bag which is used to fill with the raw water, another is white used to fill with the filtered water. They are connected via the straw to filter the water for drinking. If you have any other questions, please feel free to give us a call between the hours of 8:00 AM-5: 00 PM (PST), Monday through Friday at 1-888-352-3558. We will try our best to help you out. Thank you very much. Best Regards, Mia Lauren ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***L on August 12, 2025* ### ⭐⭐⭐⭐⭐ Review *by S***G on August 17, 2025* ### ⭐⭐⭐⭐⭐ Review *by J***S on December 2, 2025* ## Frequently Bought Together - Waterdrop Gravity Water Filter Straw, Camping Water Filtration System, Water Purifier Survival for Travel, Backpacking and Emergency Preparedness, 1.5 gal Bag, 0.1 Micron, 5 Stage Filtration, Blue - Aquatabs 397mg Water Purification Tablets (100 Pack). Water Filtration System for, Camping, Boating, Emergencies, Survival, RVs, and Marine-Use. Easy to Use Treatment and Disinfection. - LifeStraw Personal Water Purifier for Hiking, Camping, Travel, and Emergency Preparedness --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/211870133-gravity-water-filter-straw-camping-water-filtration-system-water-purifier](https://www.desertcart.us/products/211870133-gravity-water-filter-straw-camping-water-filtration-system-water-purifier) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-07*