Update: Oh no! I went through the drive-thru this afternoon, and they weren't doing the free samples anymore! I went ahead and purchased one, but I'm sorry to have mislead you!
If you're out and about today, be sure to stop by McDonalds. They are giving away free samples of their frozen coffee drinks on Fridays from 7a-7p. Yum!
In fact, if you are going to be driving by more than one McDonalds, you could do it a couple times. Not, ahem, that I would ever do such a thing. Just, you know, that theoretically it's possible.
The samples are in a little cup, about 4 oz, complete with whipped cream and a caramel or chocolate drizzle. But last Friday I went through the drive-thru, and when I pulled up to the window, the girl handed me a full-size frappe. I protested that I had only ordered the free sample, and she said that was the sample. I imagine that was a fluke, like they were out of the little cups or something, but it made my Friday (okay, I lead a boring life).
They're both good, but I like the caramel best. And I'm not even going to bother to check the nutritional data.