Platypus GravityWorks 2.0L Filter System - Reservoir Kit - $109.95

Your hand-pump water filter looks slow and inefficient in comparison with the Platypus GravityWorks 2.0L Filter System. This gravity-powered water filtration system is ultralight, easy to pack, and fast. Just collect dirty water in one reservoir, hang the system, and in just a few minutes the second reservoir will be filled with two liters of clean, drinkable water. And there was much rejoicing among backpackers. - $109.95