Jamieson, Fausset and Brown on Genesis 40:16

Ge 40:16-23. The Baker's Dream.

16. I had three white baskets--The circumstances mentioned exactly describe his duties, which, notwithstanding numerous assistants, he performed with his own hands.

white--literally, "full of holes"; that is, wicker baskets. The meats were carried to table upon the head in three baskets, one piled upon the other; and in the uppermost, the bakemeats. And in crossing the open courts, from the kitchen to the dining rooms, the removal of the viands by a vulture, eagle, ibis, or other rapacious bird, was a frequent occurrence in the palaces of Egypt, as it is an everyday incident in the hot countries of the East still. The risk from these carnivorous birds was the greater in the cities of Egypt, where being held sacred, it was unlawful to destroy them; and they swarmed in such numbers as to be a great annoyance to the people.