Please don't give me the bad mom award. I've already given it to myself. Anyway, my DD2 found a sippy cup from a few days ago (no I don't normally leave these around, don't know what happened) and started drinking the milk before I realized what was happening. She drank maybe five or six sips I would guess. I smelled it and it smells awful. I can't believe she was able to drink it. Does anyone have any experience with this? TIA