---
product_id: 337013321
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 2"
brand: "waterdrop"
price: "₱6470"
currency: PHP
in_stock: true
reviews_count: 10
category: "Waterdrop"
url: https://www.desertcart.ph/products/337013321-gravity-water-filter-straw-camping-water-filtration-system-water-purifier
store_origin: PH
region: Philippines
---

# 5-stage ultrafiltration 1.5 gal gravity-fed bag recyclable & backwashable 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 2

**Brand:** waterdrop
**Price:** ₱6470
**Availability:** ✅ In Stock

## Summary

> 💦 Stay refreshed, stay prepared — filter your way to adventure!

## 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 2 by waterdrop
- **How much does it cost?** ₱6470 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/337013321-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

- • **Hydrate All Day:** 1.5-gallon gravity water bag supplies enough purified water for extended outdoor adventures.
- • **Flow Without Pause:** Up to 700 ml/min flow rate keeps your hydration seamless and hassle-free.
- • **Eco-Smart & Durable:** Backwashable filter straw extends lifespan up to 1,400 gallons—sustainable and reliable.
- • **Versatile On-The-Go:** Connects easily to water bags or bottles, perfect for travel, camping, and emergency prep.
- • **Ultra-Clean Hydration:** 5-stage filtration removes chlorine, sediment, and odors for crisp, safe water anywhere.

## Overview

The Waterdrop Gravity Water Filter Straw is a professional-grade, 5-stage filtration system paired with a 1.5-gallon gravity-fed water bag, designed for camping, backpacking, and emergency use. It delivers safe, great-tasting water by removing harmful contaminants with a premium ultrafiltration membrane and activated carbon. With a high flow rate of 700 ml/min and a lifespan of up to 1,400 gallons, this recyclable and backwashable filter ensures reliable hydration wherever you go.

## Description

Waterdrop 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 2: desertcart.com: Industrial & Scientific

Review: Essential and excellent accessory - Very flexible and adaptable system, will work in very many different settings or activities. The Tygon tubing is good quality and the fit of all the parts is good. Because of its modular nature, this filtration system is quite compact and lightweight. The price is quite affordable. Per its usual, desertcart will deliver to your doorstep at lightning speed, so overall a very satisfactory purchase.
Review: Impressive and convenient water filtration - We used this bag and filter every day for a week of wilderness camping. I bought a second after being so pleased with this one. Flow rate is superb compared to competitor products. We had one or two days where an algae bloom heavily covered the surface water of the lake. We filtered water all week without problem. Backflushed easily on day 5 with clean water and was amazed to see the amount of algae and dirt that came from the back wash. Restored back to original flow rate. The bag is durable but I could see it getting damaged if not protected or stored properly. The water tasted good for the price point. Compact space saving design.

## Features

- 5-Stage Efficient Filtration: With adoption of premium-quality coconut shell activated carbon, 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 | B09285L8JL |
| Best Sellers Rank | #1,260 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #6 in Camping & Hiking Water Filters |
| Brand | Waterdrop |
| Date First Available | April 12, 2021 |
| Installation Type | Freestanding |
| Item Weight | 1.25 pounds |
| Item model number | WD-FSBUL |
| Manufacturer | Waterdrop |
| Maximum Flow Rate | 700 Milliliters Per Minute |
| Model Name | WD-FSBUL |
| Package Information | Bag |
| Power Source | Non Electric |
| Product Dimensions | 10.16"L x 3.39"W x 11"H |
| Special Feature | Gravity Water Filter Straw, Water Purifier Survival |
| Supported Water TDS Level Maximum (PPM) | 500 |

## Product Details

- **Brand:** Waterdrop
- **Capacity:** 1.5 Gallons
- **Included Components:** Water Filter Straw *2, 1.5 Gal Gravity-Fed Water Bag *1, 16 oz Water Pouch *2
- **Installation Type:** Freestanding
- **Material:** BPA Free Food-Grade Material
- **Package Information:** Bag
- **Power Source:** Non Electric
- **Product Dimensions:** 10.16"L x 3.39"W x 11"H
- **Purification Method:** Hollow Fiber Ultrafiltration Membrane, Activated Carbon
- **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 2 - Image 1](https://m.media-amazon.com/images/I/611WUYBZRqL.jpg)

## Questions & Answers

**Q: Can the straw be used on its own, the way the Life Straw can?**
A: Hi,
Thanks for your question.
Please rest assured that it can be used on its own.
If you have any other questions,please feel free to contact us.
Kind Regards
Mia Lauren
Customer Service Rep

**Q: Can I buy replacement filters for it?**
A: Hi,

Thanks for your interest in our filter straw product.

Please rest assured that you can reverse-flush the straw (instruction included) to prolong its lifetime; furthermore, you can also purchase a new filter straw to replace the old one:

Link:  https://www.amazon.com/Waterdrop-Portable-Filtration-Emergency-Backpacking/dp/B086QKX42Q/?th=1&psc=1

If you have contacted us via email but received no reply, please check the Spam/Junk Folder first. Thank you.

If you have any other inquiries, please feel free to contact us.
1-888-352-3558 (8:00 AM - 5:00 PM PST, Mon - Fri).

Kind Regards
Mia Lauren　
Customer Service Rep

**Q: To confirm, are 4 20 oz BPA-free reusable collapsible water bags also included or this is just for the filter straws?**
A: Dear Aaliyah,
Thank you for your inquiry. 4 packs of 20 oz BPA-free reusable collapsible water bags are also included in the package.
Please don't hesitate to let me know if you have any other questions.

Kind Regards,
Mia Lauren
Customer Service Rep

**Q: How long does it take to gravity filter 1.5 gallons?**
A: Dear customer,
Thank you for your interest in our product.
Please note that it should take around 11-12 minutes to gravity filter 1.5 gallons.
If you have contacted us via email but received no reply, please check the Spam/Junk Folder first. Thank you.
If you have any other inquiries, please feel free to contact us.
1-888-352-3558 (8:00 AM - 5:00 PM PST, Mon - Fri).
Kind Regards
Mia Lauren　
Customer Service Rep

## Customer Reviews

### ⭐⭐⭐⭐⭐ Essential and excellent accessory
*by H***E on November 26, 2025*

Very flexible and adaptable system, will work in very many different settings or activities. The Tygon tubing is good quality and the fit of all the parts is good. Because of its modular nature, this filtration system is quite compact and lightweight. The price is quite affordable. Per its usual, Amazon will deliver to your doorstep at lightning speed, so overall a very satisfactory purchase.

### ⭐⭐⭐⭐⭐ Impressive and convenient water filtration
*by J***S on December 2, 2025*

We used this bag and filter every day for a week of wilderness camping. I bought a second after being so pleased with this one. Flow rate is superb compared to competitor products. We had one or two days where an algae bloom heavily covered the surface water of the lake. We filtered water all week without problem. Backflushed easily on day 5 with clean water and was amazed to see the amount of algae and dirt that came from the back wash. Restored back to original flow rate. The bag is durable but I could see it getting damaged if not protected or stored properly. The water tasted good for the price point. Compact space saving design.

### ⭐⭐⭐⭐⭐ Awesome, it works, and gives you a lot of options
*by D***L on August 12, 2025*

This filter is awesome, used it on a three day backpacking trip recently. No issues whatsoever. For everyone’s information however, the reservoir bag does not seal fully when filled. The top, although it folds nicely into a handle for carrying - which is amazing and super convenient - it does not prevent water from coming out the top if you, let’s say, put the bag down on the ground to get the straps adjusted or something. So the reservoir is not for carrying water for long distances, unless you’re prepared to always keep it upright and never put it down until you can hang it. Still super doable if you’re going short distances, it doesn’t spill when you’re holding it by the handle, just if you put it down on the ground while filled and it falls over. Other than that, this kit is awesome. Gives you the option of reversing the steps, instead of filtering the water into the small plastic water bottle pouch, you fill the plastic bag with the unfiltered water, screw the filter straw onto the pouch, and drink it directly out of the filter (basically a life straw). I think the bag might be half a liter that it comes with, so if you want a bigger pouch then you’ll have to order one. This is the way I’ve seen most through hikers using it, usually with the sawyer filter setup. But this filter gives you both options, filter the clean water from the reservoir into the plastic flexi pouch or any other bottles you want, or collect the unfiltered water into the flexi pouch, attach the filter directly to the pouch, and drink through the filter. Super lightweight, condenses into a really small volume, durable (I carried water in the reservoir for more than 5 miles, by hand, leaning it against a tree when I had to put it down, and the material held up). We used it for three days and that was more than two weeks ago, long enough for any water born sicknesses to have shown if it didn’t work. Great purchase.

## Frequently Bought Together

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-02-02*