LifeStraw Family 1.0 Gravity Water Filter - Emergency Survival & Camping Water Purification System for Hiking, Travel, and Outdoor Adventures

I haven't opened or used this yet but I've purchased other Lifestraw products in the past. The only negative I know of and read from other reviewers is that once you open the bag there is no storage case for the unit and it's pieces so, before I open it I'm going to find a plastic tool case or something to use to store it in.The reason I'm writing this review now is to get the word out about Lifestraw. This is the second best unit I know of. It filters 4,755 gallons of water down to 0.02 microns which is enough to filter out viruses and bacteria etc. The absolute best filter I found (the Survivor Filter PRO) was twice as good bc it went down to 0.01 microns and did like 25,000 gallons or something and they both cost about the same. The reason I chose Lifestraw is because it's gravity fed and you can hook up a large water bladder or tank etc to it to feed it... The 0.02 micron level is way good, much better in fact than most water filters sold (which are generally rated at 0.20 microns) and so safe to use and have sold like 5 million units worldwide. The Survivor Filter PRO's .01 micron filter has to be hand pumped 50 times to get a 500ml (about a pint) little water bottle full of water and it uses multiple filters that need replacing etc. There is no way I could see the tiny looking hand pump lasting long enough to pump 100,000 liters. That comes out to 379 pumps for one gallon of water. 100,000L's = 10,000,000 pumps. Wow! The pump in the picture looks plastic but I seriously doubt that if it was metal and with ball or roller bearings, that it will last that many pumps, lol. But seriously, I don't see myself pumping this thing 50 times every hour to get some safe water. I'd rather just dump some water in the feed hopper (my words for it) and come back in an hour and get 2.4 to 3.2 gallons of purified water. That's an average of 2.8 gallons of water in an hour with no work, no pumping.