I was wondering the same thing, but I don't think you can if you're on the QS plan. However, I think a beverage (even alcoholic!) is included in the regular
DDP. Well, actually, I think that even on the QS plan, you get one "snack or beverage" per day. However, if you do choose the bottle of Coke, you don't get a snack (which is often a dessert).