"Сокче, сокче, рестурант!", we heard this morning ("juice, juice, restaurant").
We didn't pay much attention at first but then we realized that they had opened the bottle of cold medicine (Motrin, which is ibuprofen) and they were happily drinking from it. They probably drank 20 to 40 ml...
We called the Poison Control phone line and they weren't too worried. Told us that they should eat something to prevent an upset stomach but there's not much risk otherwise.