MSR TrailShot Pocket-Sized Backcountry Water Filter

Amazon.com Price: $54.95 (as of 10:12 EST- More info)

Pocket-sized lightweight water filter cleans water on-the-go for hiking, camping, traveling, and emergency preparedness
Drink directly from the source or fill a water bottle or hydration pack; easy one-handed operation filters one liter in 60 seconds