First, this is just a concept so don’t get your hopes up. Designers Alberto Medo and Francisco Gomez Paz has designed a water bottle that purifies water using a method called SODIS that takes six hours to kill off the bad guys, including cholera, typhoid and dysentery. The bottle holds 4 liters of water.

via Engadget

mÜV (pronounced “move”) is a floating micro water treatment device by Meridian Design. The device can be recharged by attaching its magnetic leads to almost any battery.

via The Goat

A new water filter from MSR, don’t know much other than it is claimed to be “lightest, smallest, fastest-pumping filter available”.

The Hyperflow pump will weigh 221 grams.

via The Gear Junkie

Update 1: Forgot to credit The Gear Junkie for this one, sorry.
Update 2: Added some weight info.