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Aseptic Water Packaging
- Thread starter thatmguy
- Start date
- Joined
- Jul 12, 2002
- Messages
- 3,291
The wife and I have some that are 4 years old and I popped one and drank it. Tasted ok and I didn't die. I don't know for sure, but I'd think that they are a lot like MREs in that excess heat could shorten their shelf life. Don't have any experience with actual shelf life on them as a max.
I usually carry a 1 liter pepsi bottle in a belt holder and if I'll be out for more than a few hours, I carry an additional quart in my shoulder bag, plus I always have the ability to purify more if needed.
I usually carry a 1 liter pepsi bottle in a belt holder and if I'll be out for more than a few hours, I carry an additional quart in my shoulder bag, plus I always have the ability to purify more if needed.
I don't have any long term experience with those particular products, but I am an engineer, and I mostly do water system design for a living.
The only thing that I can think of offhand is that plastic containers have some small amount of permeability that can let in contaminants over long periods of time (months to years). Contaminants go right through the plastic wall, given enough time. Plastic-coated foil helps, I don't know how much. I would not put one of these in my garage, and I would discard one that looked punctured, even by a pinhole.
I think the shelf life is just a legal thing. Nothing interesting happens to water by itself, and polyethylene does not turn water toxic with time as far as I know.
My personal assortment is a few big polyethylene water containers (stationary), some sealed gallons (vehicle mobile) and liters of water (foot mobile) from the grocer. In the bulk water, I put about 5 drops of household bleach per gallon, then sealed it gas tight. That's essentially what public drinking water systems do when they chlorinate. The idea is to make everything in there dead, and keep new live stuff out.
Water is not terribly high-tech. If it has been disinfected, remains sealed, and contains no toxins, it will be be safe to drink until the end of time.
Scott
The only thing that I can think of offhand is that plastic containers have some small amount of permeability that can let in contaminants over long periods of time (months to years). Contaminants go right through the plastic wall, given enough time. Plastic-coated foil helps, I don't know how much. I would not put one of these in my garage, and I would discard one that looked punctured, even by a pinhole.
I think the shelf life is just a legal thing. Nothing interesting happens to water by itself, and polyethylene does not turn water toxic with time as far as I know.
My personal assortment is a few big polyethylene water containers (stationary), some sealed gallons (vehicle mobile) and liters of water (foot mobile) from the grocer. In the bulk water, I put about 5 drops of household bleach per gallon, then sealed it gas tight. That's essentially what public drinking water systems do when they chlorinate. The idea is to make everything in there dead, and keep new live stuff out.
Water is not terribly high-tech. If it has been disinfected, remains sealed, and contains no toxins, it will be be safe to drink until the end of time.
Scott
- Joined
- Apr 27, 1999
- Messages
- 6,117
I worked in a lab where we measured water flow over long periods of time and often used water-filled U-tube manometers to measure water pressure. The most conspicuous problems that we would see is algae buildup. This happens if you have a little bit of nutrient in the water and light exposure. A few drops of bleach helps, but keeping the water in the dark sometimes helps more. You almost never start with absolutely clean water so there are usually a few algae cells in there to multiply. They need to photosynthesize so storing the water in a dark place or wrapping bottles in aluminum foil helps a lot. I've got a horizontal freezer in my garage and I keep a few gallon jugs of water in there. In the frozen darkness the water will last forever. If my power goes out it keeps my meat stockpile cold.