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💦 Stay refreshed, stay unstoppable — pure water wherever life takes you!
The Waterdrop Gravity Water Filter Straw is a premium 5-stage filtration system featuring a 0.1-micron hollow fiber ultrafiltration membrane. Paired with a 1.5-gallon gravity-fed water bag, it delivers up to 700 ml/min of clean, safe drinking water, filtering up to 1,400 gallons before replacement. Designed for camping, backpacking, and emergency preparedness, it offers a durable, recyclable, and easy-to-clean solution for reliable hydration anywhere.

















| ASIN | B086QNLBB4 |
| Best Sellers Rank | #1,989 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #7 in Camping & Hiking Water Filters |
| Brand Name | Waterdrop |
| Capacity | 1.5 Gallons |
| Container Type | Bag |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,582) |
| 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 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 |
| Part Number | WD-FSBUL-1 |
| Power Source | Non Electric |
| Purification Method | Hollow Fiber Ultrafiltration Membrane |
| Smart Home Compatibility | Not Smart Home Compatible |
| 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. |
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