Okay guys what are drink cards? I am set to sail on the Liberty 5/8 and was already going to wait until we board to purchase drink package, but now I hear (well, read) there is some sort of drink card which is far less expensive than the cost of our two Ultimate’s which is roughly $990. Please if someone would take the time to explain the difference between the drink card and the drink package in detail, I would GREATLY appreciate it!!!!