A cool drink was pressed into his hand, something that had happened countless times before, and every time Harry had smiled at the server and abandoned the glass first chance he got. Not to drink anything in good faith had been one of the first lessons Tom and Severus had drilled into him. Too many potions could be slipped unnoticed. The young man relaxed when he realised that Severus had served him. He even took a sip after the Potion Master had given a miniscule nod. God, he was parched.