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Storing water in mylar bags

2.7K views 14 replies 9 participants last post by  Wyomike  
#1 ·
How long can water be stored in mylar bags?
Using these bags - 7.5 MIL 5"x7"X3"Gusset Ziplock Mylar® Bag
Water comes from a very good well.
First run water through a Berkey filter.
Next boil water.
Let cool.
Put water in bag and press out the air and seal with Ziplock.
Then heat seal.
Would this not last many years?
 
#5 ·
Water doesn't spoil. As long as it's clean going in, and inside the mylar is clean, then the water should last indefinitely.

I think a bigger question might be how you're going to dispense it.
 
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#6 ·
no - unless you want a hell of a mess >>> when you come up with these ideas >>> great check is to see if it's being done commercially - if it was possible they wouldn't be using multi-layer pouches ....

if a regular water container offends you that much - try finding a bladder in a box - like they use in commercial cafeteria machine beverages or retail bulk wine .....
 
#7 ·
There actually are boxed mylar water storage systems you can purchase online. I have one myself, bought years ago. There is a 5-gallon mylar bag with spigot that you put inside a heavy-duty cardboard box, fill it, and there you are.

Here's an example (no specific endorsement implied, just information):


These types of approaches allow for cheaper storage than an Aquatainer type of approach, but they're also not as robust.
 
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#9 ·
It may be cheaper to store large quantities of water using something like mylar. Bottled water over time tends to...evaporate through the plastic or through the lid, so it's not a good permanent solution. But it's a heck of a bugout solution, IMO.

I have about 120 gallons of water stored in various formats, including bottled water. I have some in Aquatainers, some in the mylar/cardboard box format, some in 1-gallon distilled water jugs that I refill with RO water as used.

A case of bottled water is about 3 gallons (varies). I have some in the garage ready to be tossed in our vehicle if we'd have to bug out in a hurry. IMO, bottled water is an excellent bugout water source. It portions easily, can be split up if necessary, can be handed out if that's something reasonable....

My plan is to have 4 cases at the ready at all times, and sometimes more. That allows me 12 gallons of water which will last us for the bulk of a week.

About the only downside to bottled water is they aren't easily refillable as would be the case with a 3- or 5- or 7-gallon container.
 
#10 ·
Bagged water is quite common in the boating community.

Here is a link: https://www.amazon.com/Datrex-Emerg...words=emergency+water&qid=1684062908&sprefix=emergency+wate,aps,321&sr=8-6&th=1

So there some more obscure practicality to bagged water like this.

In my vehicle, my emergency water are the typical Walmart 13 oz bottles that are laid sideways in a saddle bag type setup (this is what practically fits my car). Due the the roundness of the bottles there is space in between the bottles. Considering a bag system might allow me to squeeze a little more water in.

That all being said......I am continually drinking though the water supply which is where the bags are not practical but as an emergency water supply not a horrible idea.

HK
 
#11 ·
Water stored on mylar will be fine and be safe as long as the mylar stays intact. However, a couple of considerations; first mylar itself if not very robust and durable for rough handling especially in an environment like your vehicle, second I doubt that you will be able to get all the air out and get good seal.

There are commercial options available for single use bags similar in size you indictated in your OP. @HenryJKR gave one link, but here is another:

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