Draco shot him an unimpressed look, "Thank you for reminding me of the obvious," he said flatly, though Harry noticed that he repositioned his hold on the cup so that he was holdings its neck rather than its bowl. He hesitated, before moving to hold the cup down on the cabinet’s top, "Well then," he said shortly, hovering the tip of the fang above the cup’s gleaming golden surface, "here goes nothing I guess," he said uncertainly, glancing up to Harry for reassurance.