Pg. 51
He placed his empty glass on a small table beside his chair, but before he could do anything else, Uncle Vernon shouted, “Will you get these ruddy things off us?”
Harry looked around; all three of the Dursleys were cowering with their arms over their heads as their glasses bounced up and down on their skulls, their contents flying everywhere.
“Oh, I’m so sorry,” said Dumbledore politely, and he raised his wand again. All three glasses vanished. “But it would have been better manners to drink it, you know.”