Where did the Baskets come from?

At tonight's Bible Study we studied, among other things, the miraculous feeding of the five thousand. I was struck by the twelve baskets' worth of left-overs. Where did the eleven empty baskets come from, assuming one was the means by which the original loaves and fish were transported? The text does not say. We can however infer that He who can provide so great a meal will also provide the means by which the mess is neatly and tidily concluded.