A question had appeared in a student's medical examination which read: "List four benefits of breast milk." A student began to answer the question:
1. No need to bottle it.
2. Cats can't steal it.
3. Available whenever necessary.

But the fourth point eluded him.

When there were barely a couple of minutes before the exam ended, the fourth point flashed before his mind. So he completed the answer by writing:

4. Available in attractive containers.