As it currently stands, Glass Jugs do not prevent various drinks (i.e. Mead) from degrading into Vinegar over time.
It would be handy to have Glass Jugs serving the function of safe drink storage and probably increase usage of drinks for feasting as such container would be more handy than a bunch of barrels.
If one would wish to ferment the drinks into Vinegar they could use a bucket instead. Feature itself, it does not seem like an overly complex change to do yet would be a neat QoL change.