I'm arriving into Auckland from Cook Islands and have a connecting flight to Christchurch. Will I be able to get a bottle of rum at arrivals, and bringing it on the plane to Christchurch. I assume I have to go through a new security screening? I don't want to pre-order and pay online, before I'm sure.

I know it's not a problem in Europe as long as it's sealed, but I wasn't able to find much information googling.