Reddit reviews DATREX Emergency Water Pouch for Disaster or Survival, 125 ml Each

OP likely means the typical Coast Guard approved water pouch, like Datrex. https://www.amazon.com/DATREX-Emergency-Water-Disaster-Survival/dp/B01DULZFRI

They're pouches because they let you optimize space in a box (or stored on your person/vehicle/vessel), where a cylinder is going to mean lots of wasted space between bottles.

DATREX pouches. Tough, freeze-safe, long-term, and a failure will cause a fraction of your water to leak out.

Here's one way to deal with water:https://www.amazon.com/DATREX-Emergency-Water-Disaster-Survival/dp/B01DULZFRI

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They last about 4 years.

So you could buy 3 days' worth and just shove them into the closet where you keep that stuff, and write the date in big letters on the end of the box that you'll see. Then start using it up and order new once you get to that date.



and here's an emergency management site.
https://earth911.com/home-garden/how-to-store-water-for-emergencies/


there is "water preserver" that treats water in containers.
https://www.thereadystore.com/water-preserver


And you can buy a water filter that could filter any water you do have.
https://theprepared.com/gear/reviews/portable-water-filters/

You can seal it in mylar with no problem, make your own of these in whatever size you want. The problem is trash created (not good for hiking), the ease with which it could be ripped or punctured if thrown unprotected into a pack, and the "floppiness" of the container once it's been opened... It'd be much more likely to spill than almost any other liquid container out there.

I've bagged water in mylar inside of 5 gal buckets because the taste of even food-grade plastic leaches into water. It's fine.

I carry 4 of these, but I am also in the PNW, so lack of water is not an issue.