Biology exam

Students in an advanced Biology class were taking their mid-term exam. The last question was, "Name seven advantages of Mothers Milk", worth 70 points or none at all. One student, who had also partied the night before, was hard put to think of seven advantages. He wrote...
  
  1.) It is perfect formula for the child.
  2.) It provides immunity against several diseases.
  3.) It is always the right temperature.
   4.) It is inexpensive.
  5.) It bonds the child to mother, and vice versa.
  6.) It is always available as needed.
  
And then, the student was stuck. Finally, in desperation, just before the bell indicating the end of the test rang, he wrote...
  
  7.)  It comes in such cute containers.
  
He got an A

Thanks Mary