Just my opinion: No worries on flavorings as you honestly can smart buy or leisure buy. Companies such as Larans, And so many others just research it have been and will always put out these concentrates. 30yrs ago I remember my Grandmother experimenting with other flavors of hard tac candy like cinnammon but Peach, Grape, Root Beer etc and was not oil like the cinnamon you would buy at pharmacy counter. Home brew, same thing and the market for these flavorings is so much higher than our industry and without out it these flavor companies would go on like we weren’t a factor. Nicotine, I expect may at worse case be more regulated but not unattainable. Logistically I’ve been involved and on political side of things there won’t be any attention for some time to that side of things if ever. I attest, once PMTA’s are past the work of review and acceptance will begin after the 8th and the only vapor products, (which have already turned in and been in the accepted bins) that will survive legally will be that in which BIG TOBACCO owns. RJ, ALTILA etc will take the market over, and the politicians will continue without worry of retraction their MSA $$$ and all the POWER will be back in control of the DICTATORS! Black Market will be KING & we will be fine. The only drawback, won’t be any shops or places for the still smoking adult to confer with one of us to assist them into our lifestyle or have a healthier alternative and access to a smoking cessation without feeling like their buying drugs on the corner or some whipper snapper going to cop for them a MTL set up. No, they will have the IQOS or some other vapor product from PHILLIP MORRIS. So be easy my Padiwan for vapocalypse is a ways off yet.

While it's possibly true in that flavorings never "expire", the base it is in has a limited shelf life. PG supposedly has a 3 year recommended shelf life and VG a 2 year life. That isn't to say your PG-based flavors won't last for 4 years. Store in a cool, dry place for all.

Any that have alcohol will "change" based upon exposure to open air as the alcohol evaporates. Lot of mixers prefer lower alcohol to where that flavoring steeps in faster while also making it more vape-able off the shake. But then any flavor looses it's potency the longer the bottle is open.

EDIT: Some people do freeze their nicotine. And they will sometimes divvy up a 500 mL into smaller bottles.

The CXT no-freezing thing has come up a few times. The consensus seems to be that you should ignore their warning and go ahead and freeze it.

My first 120ml I ordered from them, I left it at room temp and after a few months had darkened and developed a strong taste, but still worked fine.

I've been freezing my CXT now since that happened, and have had no issues. It stays perfect.

Over on ECF, a user has been documenting freezer experiments for several years using nicotine as old as 2014. In november he started including Carolina in the trials. His first results came in last month.

https://www.e-cigarette-forum.com/threads/nic-base-storage-freezer-vs-room-temp-experiment.791603/page-56#post-22700315

The TL;DR for this is that the best thing you can do for your nicotine is keep it cold.

I strongly suggest decanting the 500mls into smaller amber glass bottles. Exposing the whole batch to air once while doing this is inconsequential compared to the potential damage from thawing, refreezing, opening and closing the same big bottle many times. It's also a lot of eggs in one basket. If a bigger bottle breaks, you'll be that much more SOL in a post-PMTA world.

If you're worried about it, you can purge air from the bottles with argon gas sold as wine preserver. It comes as an aerosol can and you simply spray a little in to displace any oxygen left in the bottle. Argon is heavier than air so it's quite simple to do. ~$15 on amazon, I like ArT brand because they clearly state it's mostly argon, other brands seem to be mixes of various gasses.

The jury is still out on PG vs VG for long term quality. Most lean toward PG, but some think VG may actually protect the nicotine molecules better due to it's higher viscosity. However the VG itself may degrade more than PG would. Personally I don't think it matters much. Again just keep it cold.

Another key tip that doesn't get spread as much as it should is that you should let your frozen nicotine bottles thaw to room temperature before opening. Condensation can form on the inside of the cold bottle or the surface of the cold nicotine liquid, contaminating it with water and degrading its quality.

Purely anecdotally, this all happened 5 years ago in the UK when the TPD regs came In. And we all panic bought nic and flavourings. I ended up with WAY more than I needed and when I moved back to the states from England at the beginning of this year I still had half my stash and had to give it all away.

Anyway, I can speak from 1st hand experience here, there is no degradation. I had my PG suspended nic in 250ml amber glass bottles (that’s how it came to me) all in the freezer and just kept the bottle I was using at room temp in the mixing box. I never noticed any change in flavour or potency for the nic or the flavourings. And I was selling/supplying mixed juice to a half dozen people and none of them noticed any change either. (In fact the person who took it all over from me is STILL using it all and it’s still fine).

Also, while there was all manner of talk there about never being able to buy nic again at more than 20mg. or larger than 10ml bottles, within a couple of mo this of the regs coming in, suddenly there were all manner of websites who would pop up for 2-3 months, selling the stuff at normal prices, then vanish. Still like that there now. You never get to buy from the same company twice, but there is always someone selling the stuff. (A big difference is that EBay uk allows vape stuff so that’s always a good place to find it as well).

Anyway, all of that is to say, nic seems to last damn near indefinitely in the freezer, and even if you don’t have enough, there will always be SOMEONE who will be selling it. I still have stocked up here so I don’t have to deal with it, but it’s not like the FBI is going to be chasing down end users of nic concentrate.

Amen brother

To be “Safe” I have 2 back up Dual Topsides and a few liters of 48 mg/ml VG. I bought a bunch of amber Boston round in 4 8 and 16 oz. I also purchased several liters of VG and PG which probably wasn’t necessary. Anecdotally nic lasts the longest in a freezer in amber bottles with about a 1/4” from the top. I bought nic and PG and VG from LNW. Bottles are inexpensive from Amazon. I’m putting the VG and PG in amber bottles in a cool dry place away from UV. That’s what I found from extensive research. I also found the complete opposite storage methods. LOL. The glass for everything to avoid plastic leaching. I guess I’ll find out.

Flavors don't expire per se, but may lose potency and/or develop off-flavors over time. And more importantly, your flavor preferences are likely to change over time.

No need to worry about flavor availability under PMTA. I don't know what the vendors whose primary business is nicotine will do, but those who are primarily in the flavor business should be fine. And if all else fails, we can always order directly from FLV, TPA, etc.

From what I've seen, flavors have at least a two year shelf life, but I've also seen people say that they have had flavors for like six years. I wouldn't worry about getting flavors. Bullcityflavors and Flavor Jungle only sell flavors and with this upcoming PMTA, their business is only going to increase.