Originally Posted by
ESpen36
I forgot to mention that many of those countries conduct 100% secondary carry-on baggage screening on the jetbridge to check for liquids on flights to the USA, so you cannot buy a bottle of water after security to take on board!

(really annoying when those flights are 16+ hours!)
I've flown out of NZ, Aust. and Brazil. While they did secondary searches I was never made to give up my liquid purchased after security. Not sure why they'd do that since you wouldn't even be able to buy duty free if that was the case.