I think there could be cups of tea and coffee as mana restorers, and possibly this could also have alchoholic and tea total skill tree's if someone can think of good idea's for those, obviousely tea total could have something like a portable kettle to boil his cuppa, and an alchoholic could have a home brewing kit or a debuff if he hasnt drank for a while and is sobering up.
Long Island Ice Tea Which for the most part does not consist of a drop of tea, but rather various alcohols. Would fit into the game perfectly . If Tea/Coffee beverages were added I should think they could boost certain stats and nullify certain debuffs.
What if there were drinks that gave and ? I'm thinking energy drinks, Muscle Diggle protein shakes, etc.
Coffee can add some caffeine (sp?) related buffs, maybe increasing nimbleness at the cost of reduced sneakiness (hyperactivity) for example.
