What else in a cup

Mac sometimes can't find the word for what he's trying to say, so occasionally, he will say to me, "Mac want something." (The something to which he is referring is a mystery I must figure out.)

This morning, he took it to a new level. He wanted a snack, but didn't know (or couldn't remember?) what he wanted. So he followed me into the kitchen and said, "I want 'what else' in a cup."

I wonder what he was expecting to get? So I asked him...Do you want cracker? Cereal? Raisins?

He decided on raisins. What else in a cup.