So the people in this office think that their new intern is "great" because he managed to go all the way to McDonalds and bring back the right coffees. Uh-huh.
Personally, I'd pull the intern aside and tell him that McDonalds has these things called "lids" and they are available for the coffees with whipped cream as well as the ones without. They are really helpful when you pick up coffee that is actually coffee and not obviously plastic. As in, real life. Which is what I think McDonalds was going for here....which means that this intern is not "great," but instead really, really stupid because he got lids for some of the coffees but not for others. Even if the McDonalds he went to is on the main floor of this building, that's really stupid and not something any "great" intern does-- or anything anyone with two brain cells to rub together does.
So who is dumber here- the stupid intern or the employee who calls him "great?"