You can bring liquids on board. You can bring liquids thru security as long as it’s a certain amount. They will make you pour out water or drink it before security but stuff for a baby can be allowed.
You can bring bottles of booze on board as long as it’s purchased inside the safe zone. You can’t drink it on board even though it happens. It all depends on if they have power hungry goons working security.
I’ve seen them search old Japanese ladies on a Japan bound flight and I have breezed right thru without a second look and I look like a terrorist.
Well, next time I'm flying, (if that ever happens - I'd rather ride my Harley), I'll but something in a big glass bottle inside the terminal, so I'll at least have something to defend myself and the rest of the passengers with.