So I've started to force myself to enjoy almond milk as it has a lot more calcium than the non-fat I have been drinking. I usually buy the Blue Diamond half gallon in the refrigerated section of the store. It says on the package "keep refrigerated". I was at a local store last week and they had the 32oz size on sale but it was just on the shelves, not refrigerated, so I bought a couple. I cannot figure out why one has to be refrigerated and the other not....doesn't say anywhere to keep refrigerated only to refrigerate after opening. I have compared both boxes and the ingredients are exactly the same...there is nothing different other than size. Can anyone tell me what the difference would be? I'm baffled!