Alexis: "Baba"

Daddy (handing nearby sippy cup to Alexis): "What's in this cup?"

Mommy: "I don't know. I put it over there so it could get washed."

Daddy: "Is there milk in it?"

Mommy: "If so it's from yesterday. That cup was on the table. I seriously put it over there so it could get washed."

Alexis spits soured milk all over counter.

Mommy and Daddy (in unison): "It was milk."

The morale of the story, check the contents of sippy cups before handing them to babies. Oops!