What was that?

Do you ever play this game with the leftovers you find in your fridge? You know, that stuff that is now green and black and smells like Pine-sol?

We played this game at our house yesterday, only it was a cup I found in Garrett's closet.

This is what we saw:

And this is the glob that came out:

Carefully, I opened it up to pour it out and it smelled like the Jack Daniels' Distillary in my kitchen!

Garrett said, "That's juice...no milk...no juice."

My final guess is juice.