so while in KC the other day, the barista at the Starbucks shared a piece of knowledge that I am passing on to all of you.
the only difference between a venti and a grande is that the venti has one more pump of syrup and more milk. they both have the same amount of espresso. so if you get the larger one because you want more caffeine - like I have always done - you are only getting more calories. To get the biggest caffeine bang for your buck - go grande.
Use this knowledge wisely.