I really like these things for everyday outdoor use. I've had the microfilter for a while (not quite the purifier of the exestream) and use it kayaking all the time. Just dip in the cold river water around you, and you have cold clean water all day. Much better than trying to plan to carry several bottles for a day, and much more convenient than using the tablets that are stashed away just in case.

It does require a decent squeeze, but the beauty is you're hydrating much more often with smaller sips, now that you (likely) won't run out that day.

J