However, caution is warranted when drinking a heavily caffeinated beverage like Buzz Water because of undesirable side effects of excess caffeine. There are a variety of brands, such as Life O2, Oxy-Water, and HiOSilver. These products are designed to compete with sports drinks, claiming that the body's needs for oxygen is greater than the supply available in the air we breathe. None of these claims have been substantiated. There's more inter-industry competition in this market than with caffeinated waters.
Most plastics are non-porous and easily contain both liquids and gasses when tightly closed.
As most of these products are chemically identical or very similar, and contain no chlorine or other preservatives, their shelf life should be comparable if sanitary standards are equally stringent at their bottlers' sites. And since O2 is O2 just about any way you look at it, these products are offering the same thing. The only difference is the amount of oxygen they contain, which is claimed to be 5 to 10 times what is normally found in spring water. The main organ of oxygen absorption into the body is the lungs, not the stomach or any other part of the GI tract. The answer depends on many factors.