I always use wine bottles with mead and generally I use the 375 ml bottles for very sweet meads or meads with fruit. I use the 750 ml for regular, medium or dry meads.
For me, once the bottle is opened It needs to be finished off!
:drunk:
I always use wine bottles and generally I use the 375 ml for sweeter meads and meads with fruit in them. For plain meads I use the 750 ml bottles. For me, once that bottle is opened it needs to be finished :)
I would say that if you want to play it absolutely safe then heat the mead. This will eradicate any chance of unwanted yeast and bacteria.
If you are a bit more adventurous try it without heating.
For a middle of the road solution you might try sanitizing your honey and water must mix...