My freezer "doomsday" stash, which I decanted into the blue, I think 240ml bottles, wrapped in tinfoil in order to protect from any stray gamma rays and was left over from one of my several tinfoil hats, then placed in a sock (not put a sock in it, yet, put a sock on it ..

..), were never washed prior to use .. in fact, I never thought about it ..
However, my stainless hipflask, does get a complete rinsing between fillings, even though the contents when filled are of an antibacterial nature ..

.. I then place said hipflask on a burner of my electric stove and set it for "keep warm" for a half hour or so in order to dry the interior .. let cool, fill again, rinse and repeat ..
We must always set priorities ..