Sawyer water filter (copy & past links into your browser) https://amzn.to/3ZVrjRC (amazon affiliate link) Wranglerstar PROfessional Homeowner PROhO beloved if I could only have one survival item and I had to choose it would be this this is a sawer water filter 25 bucks you got a bottle water you can fill it up with a contaminated Source it's designed to go online and match up the threads now you can drink directly from the source with a filtered water it's also going to come with a myar extra bag this will give you another 32 oz so you've got a backup system you got two cantens in one make this part of your EDC look how little it is it can roll up together you can keep it in a park pocket a cargo pocket you can keep it in your backpack have it on you make sure it's within reach and have one for your whole family 100 bucks buys four of these saw inline water filter I'll put a link in the description