I've been DIY'ing for almost 3yrs now, the better Nic's I have always gotten where clean looking, the extraction process and Lab work , along with just an extra clear and no harsh or bad smells, and those vendors, Levy, Randy, and only 1-2 other always have a high grade it seems so I've stuck with them, I would bet VZ's Nic is coming from one of these guys or direct from China then sourced to a lab in the states then back to them.
Also these people can say what they want but, Oxygen getting at the Nic is not good guys,, and it thrives in the very cold. Look I have Nic that I have had in the test process for just over 2 yrs now, putting it in the deep freezer, in a glass bottles, filled up to the top so no air gets in,, and sealing that bottle top. It's the best way to store it in my opinion, only my opinion for what its worth, all you have to do is try this. I have the proof here at my home, the stuff left out has turned a dark golden brown and smells really bad, the freezer stored is still in great shape. Try it, that's all Im saying try it, I only keep out a small amount, then keep my small bottle that I currently use in the freezer, I take out what I need, then right back in the deep freezer, the bigger bottles I dont touch accpet when I have to ad to the smaller bottle,It all stays in that deep freezer filled to the top in the bigger bottles as much as I can, and in that freezer in a blue glass bottles.
Ask Levy, Ask Randy, ask our ECF Chemist Kurt,, the guys will tell you the same thing and its how I learned from Levy, Curt, and even Randy has said put it right in the freezer.
madvapes is also doing a Nic test,, first bottle that has dropped in it's MG = Bottle left out on the window sill
Edit: but in the end I would rather have fresh all day long
