Doesn't the plastic leech into the water? Hence the expiration date? My understanding that these are not a good long term solution but I could be wrong.ah...good info. another thing about these 2.5 gal jugs...they look like the pic below. only 20 years ago the plastic was clear, not the white opaque color they show. and what worries me is the built in spout not being air tight and letting organisms in. probably why the water evaporated like it did. i dunno, i should know this stuff, i'm a lousy prepper.
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That being said, I bought a few 7 gallon "aqua tainers" but I haven't filled them yet so I can't comment on their durability.