Soda in the MDR/Cabanas or from the self-serve stations.
Coffee (basic) from the MDR/Cabanas or the self-serve stations.
Tea (iced of hot) from the MDR/Cabanas or the self-serve stations.
Milk from the MDR/Cabanas or the self-serve stations.
Juice from the MDR/Cabanas or the self-serve stations.
Water (tap) from the MDR/Cabanas, the self-serve stations, or your cabin sink.
All of those are included in the cost of your cruise. (i.e.: NOT "free").