Poop in the water

Miss 3 has decided she doesn't like tap water, especially not when there is orange juice in the house.
Miss 3: "I don't wuv this water"
Me: "why not?"
Miss 3: "Little brother pooped in it. He weally weally needs to poop and he couldn't find the toilet, all he could find is my bottle, so he taked the wid off and he pooped in it."
This translates loosely to "I want some orange juice"
What can you say to that?