About 20-30 minutes later, I see David drinking from another sippy cup. Again, being unsure as to where he got the cup, this time I stopped him before he got cup to lips. I didn't even have to open the lid to know we had another "liquid surprise" on our hands. This time it was apple juice. Correction, I think after the fermentation it was apple wine.
My guess is that milk and juice were at least 3-5 days old. I just went ahead and threw both cups away. I don't think there would be enough soap to get those clean. I may need to start cleaning on my hands and knees or employ a midget housekeeper. `