THe problem would be getting the cans of pop SAFELY to the destination. The likelihood the cans will puncture due to the careful, loving, and thoughtful handling they get from the bagge handlers is quite high.
I have yet to have 100% of my items I bought come back the same condition when I bought them. Usually one, two, or more items get broken and have to be glued even though I packed them ever so carefully.
I would suggest, if you know your brand of pop is not available, to buy it when you get to the port city and get a cab to take you to the nearest Walmart or store you can buy it a. Otherwise, just get a fountain card on the ship and be done with it.
2007 Victory & Triumph
2008 Conquest & Liberty
2009 Valor, Freedom, and Splendor
2010 Glory and Liberty
I gotta go where it's warm.....
Over 40 victim of fate.....