I've seen 100mg base darken and become less than clean tasting in only a few months when stored at room temperature. This was in bottles that were only 1/4 to 1/3 full (the left-overs from the blind-test roughly 100 pages back in this thread). The three nics in plastic darkened the most, while the one in glass changed the least, but they all degraded some. Of course a bottle that's only 1/4 to 1/3 full has a lot more oxygen in it than one that's "full", so that was probably a worst-case scenario.My nic is staying in amber glass in the freezer but what makes everyone so sure that nic concentrate is so perishable?
I also had a second 120ml plastic bottle of of one of those nics (VZ) that went straight into the freezer when I received it. I pulled it out and mixed with it about 9 months later and it was "good as new". Then there are the four 120ml plastic bottles (WL) I got in the spring of 2014 that has forgotten about in the bottom of my wife's big chest freezer. I found them again 2-1/2 years later. Figured they might be ruined, but I mixed one down anyway and it was also "good as new". I'm keeping the remaining three in the freezer as an experiment.
Thus my assessment is: Storage temperature plays a an important role; quite possibly more important that the type of bottle that the nic base is in. Also, more than a minimal amount of air in the bottle is bad.
I might take that gamble, but only if it's in glass and the bottles have minimal headspace, and only as a temporary measure. No way would I plan to keep it that way for a decade or more.There may be people hesitating to store nic because they don't want to put it in a freezer. May be it is a good gamble to get some nic even if it will be stored at room temperature?