"Do you know what this is, Potter?" Snape said, his eyes glittering dangerously again.[br]"No," said Harry...[br]"It is Veritaserum -- a Truth Potion so powerful that three drops would have you spilling your innermost secrets for this entire class to hear
The Leaky Cauldron is not associated with J.K. Rowling, Warner Bros., or any of the individuals or companies associated with producing and publishing Harry Potter books and films.
"The Leaky Song" by Brad Mehlenbacher of Draco and the Malfoys