My long term storage bottles are 1 liter amber glass. For mixing I divide the liquid in to 4 250 ml amber glass bottles. Everything stays in the freezer, temperature at 0 degrees, I can't go colder. The last time I mixed was from 4 years old inventory. The liquid showed a hint of yellowing for the first time. Next time i mix I'll take a photo and post here.
I'm planning one more nic buy and procastinating for as long as possible hoping for fresher stock. (but don't get caught by panic buying when some deadline is announced). Should I be considering nic salt just for the sake of shelf life? Does nic salt taste different? I mix 12 mg freebbase and vape at 25 max watts, 420 max temp, single coil stainless around 0.8 ohm mostlyy on an old school
rda.