Waterdrop Gravity Water Filter Straw with 1.5 Gallon Bag
- 0.1 micron hollow fiber ultrafiltration
- 1400 gallons filter capacity
- 700 milliliters per minute flow rate
- 1.5 gallon gravity bag included
- 4.64 ounces listed weight
- 300 PPM maximum water TDS
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A hollow fiber filter straw that works from a hung gravity bag, with a large filter life and no pump. The listing does not name which contaminants are removed.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B086QNLBB4Category: Camping Water Filters
Colors Available
Need a different one? Pick on Amazon →
Overview
Not a pump filter or a chemical tablet, this is a hollow fiber ultrafiltration straw that fills from a hung gravity bag. The bag hangs freestanding and the filter needs no power.
Gravity feeding frees the hands in camp, and the large filter capacity covers many trips. The straw can also be used at the source. The listing gives a pore size but does not name bacteria, viruses or chemicals, so claims stay narrow.
Who it's for
Hikers, campers and emergency planners who want a light filter with a bag. Travelers drinking very salty or heavily mineralized water, or needing virus claims, should read the limits first.
Pros and cons
- Hands-free gravity feeding
- No power needed
- Large filter capacity
- Light filter weight
- Contaminants removed not listed
- Water TDS limit applies
- Gravity bag needs a hanging point
Performance notes
A hollow fiber membrane strains water through pores of a set size, and gravity pushes the water through. Flow rate falls as the filter clogs, which is why backflushing matters. The listing gives a TDS limit, meaning the filter does not remove dissolved salts.
Specifications
| Brand | Waterdrop |
|---|---|
| Dimensions & fit | |
| Item weight | 4.64 ounces |
| Item Dimensions L x W x H | 6.77"L x 3.39"W x 10.91"H |
| Filtration size | 0.1 micron |
| Capacity & performance | |
| Maximum Flow Rate | 700 milliliters per minute |
| Capacity | 1400 gallons |
| Power & efficiency | |
| Power Source | Non Electric |
| Compatibility & installation | |
| Installation Type | Freestanding |
| Included components | |
| Included Components | Water Filter Straw, 1.5 Gal Gravity-Fed Water Bag, 16 oz Water Pouch |
| Unit Count | 1 Count |
| Warranty & support | |
| Supported Water TDS Level Maximum PPM | 300 PPM |
| Other details | |
| Purification Method | Hollow Fiber Ultrafiltration Membrane |
| Container Type | Bag |
| Other Special Features Of The Product | Gravity Water Filter Straw, Water Purifier Survival |
Closest rivals on specs
LifeStraw Peak Series Personal Water Filter Straw- Item Weight 0.29 vs 0.22 pounds (+32%)
Membrane Solutions S2 Water Filter Straw 4 Pack- Item Weight 0.29 vs 0.19 pounds (+53%)
Sawyer SP129 Squeeze Water Filtration System- Item Weight 0.29 vs 0.16 pounds (+81%)
Frequently asked questions
What is in the box with the Waterdrop gravity filter?
One water filter straw, one 1.5 gallon gravity-fed water bag and one 16 oz water pouch.
Does the Waterdrop filter need electricity?
No. The power source is non-electric, and the bag feeds by gravity.
Does the Waterdrop straw remove viruses?
The listing gives a 0.1 micron pore size but does not name viruses or other contaminants.
How fast does the Waterdrop filter flow?
The maximum flow rate is listed at 700 milliliters per minute.