http://www.forrestrace.com/half-cup/

Is drinking half a cup of coffee a day okay?
I only drink half a cup, or less of coffee a day. Is that just as bad as a full cup, or is that okay? Should I not drink it every day at all?
.Unless you have issues with caffeinee, coffee shouldn’t be a problem. In fact, it does slightly boost the metabolism. However, the problem for many is what they put in their coffee…creamers and sweeteners can take a plain ol’ 5 calorie cup of black java and make it into a beverage that has more calories than a lot of meals.
I use fat free half ‘n half in my coffee (20 cals/serving) and sugar free flavored syrup (such as Torani brand) for about 25 cals/cup. I drink a couple of large cups of coffee a day (at work).
Some people prefer decaf, or mix regular and decaf…do what works for you but keep in mind what you put in it is where the real issue is.
EDIT: Regarding the brush-your-teeth issue (good point she made) if you drink through a straw (which I do) it keeps the beverage off your teeth and greatly reduces any coffee/tea stain issues for your tooth enamel. ☺
World Cup 1950 Final – Brazil 1:2 Uruguay