Looking up from his third glass of water that day - it was nearly six in the evening - Harry merely grinned and pulled out the vial. Immediately Vernon reached for it, pulled it from his neck ... ouch, they did not seem to have a high pain tolerance since they all cried out ... and stomped on it. When that didn't work, he put a hammer to it, tried to burn it and then throw it out. With detached interest, Harry watched his uncle. He had faith in the curse-breaker to make the anchor of his curse indestructible. After the vial had been thrown into a gully, Harry took a knife to his arm and made a shallow cut. No apparent range limit, or a massive one, knowing Bill. An interesting piece of magic. He would have to get Bill and Hermione to discuss it. Maybe even Bill and Tom.