"Ten points to Gryffindor," Malfoy drawled. "I'm working on a version that doesn't involve steam emitting from the drinker's ears for hours on end, but I haven’t got it quite worked out yet. For this batch, I've added a few Dittany leaves and tried  Tergeo  as the finishing incantation, because I want it not to just clear the head and sinuses, but also heal them. I've yet to test it, but I think it should be promising based on previous results."