First thing that popped into my head, was one o the little bits of cereal (Frosties)...just one...you get a free one little bit of frosted wheat that's been made into a little square...
But it isn't...then I thought...maybe it's some kind of milkshake...or ice-cream...
I went and got 3 yesterday lol.........I just pulled up to the drive thru (at 1am) and asked for three frosties (was with 2 girls) and they just gave them to me ....no questions asked....i guess if u go w/o anybody and ask for a specific number they wouldnt know if there are that many people in your car..........