Jeff Guestwrote a review of LifeStraw Lifestraw Personal on June 29, 2016
Familiarity: I've used it several times
I generally don't need a lot of water when I go canyoneering, but I keep a Lifestraw in my pack just in case because it weighs nothing! We did Pearsons Canyon in Willard, UT which is a 2.72mi canyon with a 4,616ft vertical descent. I brought my normal amount of water which is about 1.5L in my Camelbak since it is only less than 3 miles and all downhill. Well, it ended up being a very physically demanding 9hr canyon and we all ran out of water!!! Luckily the majority of us had Lifestraws so we were completely fine! It can be awkward and hard to drink from a stream when your head is lower than your body, but it does work, and if you have an empty container that can hold water it works even better!
Check out the video with the Lifestraw making an appearance at 3:49.
Be sure to always blow out the water when you're done so it doesn't mold inside of your Lifestraw!