tisket a tasket

I bought some coffee yesterday at Starbucks:
"What do you want it ground for?"
"Paper cup."
"Paper cone?"
"No, cup"
"Flat on the bottom?"
"Yes."
I forgot the proper response is "paper basket." I'll just never get it right. And how can Grande mean Medium? I mean...grande...it sounds huge...like the Grand Canyon, which is no medium canyon let me tell you.