@score69 I've been curious about this as Im going to
buy some nic for storage myself. I see a lot of people talking about storage and they seem to be using glass pretty much exclusively.
Yes, glass is going to be the gold standard as far as being inert an unlikely to react, allow oxygen to pass through it, etc. I would agree this would be the best inexpensive way for us to store nic long term.
That said, the biggest enemy to degradation is oxygen, heat and light, all of which will speed oxidation. HDPE is pretty darn inert as well. I'm sure it's somewhat more permeable to oxygen, but not sure it's significant. The biggest concern I would have with HDPE is that over a decade or more, it could start to degrade and become brittle. Especially at colder temps like this.
The best thing to do when you receive your nic is to get it in the freezer, regardless of whether you rebottle it or not. Keeping it in the freezer will pretty much solve any short term stability issues. I may rebottle mine in glass, but personally, I'm comfortable waiting several years to do this. If you are only stocking up 4-5 years worth of nic, I probably wouldn't even bother rebottling it myself.
The biggest advantage I see to rebottling it is when I crack open a liter to start to use it. As you use it, the bottle will have more room for oxygen inside, more oxygen to react. It's best to fill bottles to the top when breaking up a liter to reduce oxygen in the bottle.
So my unopened liters stay that way, for now at least. Once I open a liter, I do break it down into smaller bottles so that I'm not continuously exposing the entire liter to oxygen each time I open/use it. Personally, I break a liter into three 250ml and 2 x 125ml bottles. I 'work' from a 125ml bottle, storing it in the fridge. The other 125ml and 250's stay in the freezer. Once I go through both of the 125ml bottles, I break the next 250ml bottle into the empty 125's.
So I leave new liters unopened, and break down a new liter as above. Seems to work for me. In a few years, I may rebottle the HDPE liters into glass 1L bottles.