Long-term Storage of Vishniak in Corny Keg (Stainless Steel) I am looking to make a bunch of Cherry Vishniak this year and I am trying to figure out how best to store it for a long period of time (1-5+ years). I have several corny kegs that I am thinking about storing it in but I don't know if vodka would work well stored in a stainless steel container for long periods of time.
The recipe for the Cherry Vishniak is
3 cups of water
3 cups of white sugar
3 cups of vodka
~2lbs of bing cherries

Boil 3 cups of water and 3 cups of sugar to make a simple syrup. Once cool add that to a container with the rest of the ingredients and let sit for a very long period of time.
I have found reference online to aluminum and stainless containers altering the taste of the contents (mainly aluminum) but nothing really related to how long a 304 stainless steel keg can hold something like a cherry vishniak and if it will alter the taste after a few years.
Does anyone know if the stainless steel corning keg would work for making some vishniak?
I would say try it with a small batch!
My only concern would be, if there was a pressure build up (temperature changes) in the keg, you might end up with fizzy vodka/Cherry Vishniak, now that may be interesting (I just googled it as I was typing and it is actually a thing)
You learn something every day, I may try it tomorrow (force carb) in a spare keg.