"I want milk!"

Ma Schmidt asked for milk to drink. Schmidt got her a glass of milk, and I helped her drink it. After she had drunk two swallows from the glass, she started to moan over and over, "I want milk!" She was still holding the glass. 

I tried to point out the glass in her hands. "There you are. You already have milk right there in your hands."

Finally she interrupted her moan to say casually (and with a little irritation), "I know this is milk."