We have carried on 750ml bottles without a problem. I guess you can get giant bottles of wine at a warehouse club but as one who always flies to port I've never considered it. When flying the wine must be in checked luggage, then moved to hand luggage for boarding the ship.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014