I have done a couple of searches and came up blank on this theory. I'm sorry if this is redundant somehow.
I have access to a dozen or so 5 gallon plastic water bottles. These carboys are like the ones you see in water coolers. They have a blueish hue to them but I have no idea if that color frequency retards growth of biologicals or if it just makes the water look more palatable to customers. I have a couple that have been outside on the farm abandoned for years in the weather and they show no signs of embrittlement or deterioration except for some exterior staining that might scrub off. All of them are used once with Ozarka brand water and were immediately recapped (for the most part they were recapped anyway)
I've heard of the 5 gallon bucket process with mylar and dry ice. The thing is, I have these on hand and they should certainly be food grade.
Would these make a good place to store dry goods like rice, beans, sugar, salt, or flour? I have the ability to fill them while maintaining a pure grade CO2 or nitrogen atmosphere in the bottle.
I feel I am fine on water storage at this point, so I don't need these for that.
I'd really appreciate some of your feedback since I am new to bulk food preservation and storage.