【Authentic】Sawyer 1-Gallon (3.78L) Gravity System SP160 SAWYER I purchased this new, but never had a chance to use it, so it's unused. I'm selling it at a low price to someone who needs it. Instant purchase is OK. It can be used for long-distance hiking, camping, and during disasters. It's compact and easy to carry. Mountaineering Hiking Camping Outdoor Emergency Disaster preparedness Disaster prevention Water purifier Echinococcus Spring water