Is there any chance you are travel in one of the "solo" cabins? If so, you have access to the Studio Lounge which has an espresso machine and makes things like cappuccinos. (No idea of quality.) All included with solo rooms.
That's what I'm doing because I can't drink $13 worth of coffee per day, and I'm pretty much a non-drinker at this point. If I decide I need Starbucks or a Mudslide or a soda, I'll just buy them, but most of my coffee needs, and thus most of my needs, are met. (Another benefit to being single and not willing to share with others. :D)
Have a blast!