Jumping in here.
I have been making my own e liquid for over 5 years now so that is not an issue BUT I have never put it in glass for freezing as been said here.
Currently I have what would be 12 L at my preferred nic level ( 1 L of 200 mg, 1 L of 100 mg and 1 L of 48 mg) in the freezer in original plastic containers they came in.
So my question is what kind of glass stands up to the freezer? I have glass for all my mixing ..... current flavor mixes.
As for stocking other hardware I have to do it carefully as I do not have a income that has any wiggle room. That is why I have been mixing my own for years.
You are all making me worried about hardware ..... tanks, coils batteries (various types) I don't have

I have two MVP box mod, a couple of clover Overlord 11 twists and the rest are ego twists... that all that I have been able to afford. My tanks are Nautilus mini tanks, Aerotank mini and Smok MIcro Core ADC 11 dual coil clearomizers. I clean those coils until they no longer work to stretch out the costs of them. I have some 510s for testing my mixes that is about it. Well other than the hundreds of the old mega cartomizers that I have never thrown out. So stocking up not easy if have to hold out more than a year to find something affordable.
But if need glass for storing base mix in freezer I will do that just please let me know what glass will stand up to the freezer temp.
Reading this thread has been an education.........wish I could be there with you
Oh by the way fasttech is no longer sending out batteries. Edit for this info added.