Bests & Worsts Reviews from Amazon

This is a smartly designed product. It's long enough to stick in a water source and drink w/o having your face too close. It does not have a separate straw to loose of fall out like the other smaller products out there. Unlike the expensive and large LiveSaver product (as seen on TED) you do not have to fumble around and pour water into it at risk of contaminating the mouthpiece if water drips over. This appears to have all the filtration benefits in a compact size appropriate for a backpack. It comes in a sealed bag so it can remain dry and clean until you need to use it.