Originally Posted by gp603
If they would fit, I would recommend putting the bottles in one of the standard cardboard six-pack wine bottle carriers. I have used such a carrier several times on United as my carryon without incident and without any external packaging, cushioning, etc.
^ I've used that technique several times successfully, though you might have to do some rearranging of the cardboard dividers to make the bottles fit. If available, you might also consider one of those handheld cardboard wine bottle carriers that wineries use