Definitely a food item. I like their kale and roasted veggie salad. I'm a vegetarian. So that or one of their meaty lunch things, they are the highest priced items on the menu ($6.50 or so.)
Or, if you like sweet stuff, you can get a giant flavored frappaccino, have 1/2, pop it in the freezer, and eat more of it another day. The biggest one is 24 ounces. Lesser $ value than a lunch thing, but you get to enjoy it in two sessions.
(I guess I think their lunch things are appropriate to eat in one sitting. But I don't think a 24 oz. bucket of starbucks with 80+ grams of sugar should be consumed all at once.)
It is probably blasphemous around MMM land to buy starbucks, but we do occasionally. There are 1/2 of groupons a couple times a year and I sometimes score giftcards from my employer and co-workers. We rarely get their ridiculously priced drinks or food, though. Usually just $1.85 espresso.