Perfect for a small group, the Katadyn Vario is a powerful companion in a small, lightweight package. The Vario water filter can quickly treat up to 2 liters of water per minute with less effort than you dreamed possible thanks to its Dual Piston Technology. Choose between higher 2-liter/minute output or lifespan-extending 1-liter/minute output. A trio of filters scrubs water to confidently purge the bad stuff: Activate a ceramic pre-filter with a quick turn to conquer dirtier water so the durable glass fiber pleated filter inside lasts even longer. Plus, active charcoal gets rid of odors. Together, you get fresh, tasty refreshment you can trust.