I agree with everything said above. Storing in bottles big enough to hold a 3 - 4 month supply avoids the freezing and re-freezing of NIC. If you choose to store in big bottles and thaw, poor out what you need then refreeze you do 4 things. Introduce air into the storage bottle, introduce water condensation inside the bottle, expose the bottle to unnessessary light and constantly expose the storage bottle to sever temperature changes. All of this will oxidize NIC which will introduce a harsh peppery taste and cause the NIC to take on an amber tint, darking more and more as time passes. The darker it turns the more harsh and peppery it will taste. It is safe and still OK to
vape if you like that sort of taste.
So the idea is to re-bottle into smaller sizes that will last 3 - 4 months. This way your keeping the bulk of your stored NIC Sealed, at a constant frozen temperature in a mostly dry, dark place. Once you remove a working bottle you can store your working bottle in the refrigerator leaving the rest undisturbed.