I don't know about long long term, I know flavors change, so I would say use your judgement,I think it would be fine for a yr, my opinion.. more than a yr I don't know...I was wondering about freezing my favorite premade eliquid myself. Over the years the prevailing opinion has been it would not freeze well, but I am not sure what that is based on. I know I have premade eliquid that was still great after 3 years stored in an amber glass bottle in a cool dark closet location and that was how I planned on storing some, I would buy a larger quantity if I felt freezing for longer life would be ok though.