Great! - SteriPEN Classic Water Purifier - Online Packaging

Efficient and easy to use. Works really well with a wide-mouth Nalgene. We use a bandana to filter out sediments and then the pen to finish the job.
Keep in mind the batteries are big & bulky so it adds weight to your final system.
It is our preferred system for the speed and ease of use.
Also great for non-outdoor settings with questionable water to make sure you travel sickness-free.

This review was written in the old system and had content requirements that are different than reviews written today.