Question is pretty straight forward... I'm especially curious as to how wine-bottles were closed off and how they were used.
Wax seals on bottles and ceramic pots predate cork, but rough cut, i.e. not perfectly fitted corks date back several milennia. You only need a bottle opener for fitted corks, looser ones can be pried out with a knife or something similar.
I have a follow-up question. Was sabrage ever used non-ceremonially? Or was it seen as incredibly wasteful of bottles that could be reused?