No stomach sickness - SteriPEN System Pack with Pre-Filter

My brother and I used this water purifier on a 2 day backpacking trip up to the South Manistee River Trail in northern Michigan. It performed as well as the reviews said. Easy to use. Press the button and swirl it in the bottle for a minute and it's good to drink. You need to use lithium batteries or else this purifier will not work. We picked up a pack of 4 for 6-7 bucks which isn't bad since it

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