alcohol is not the fifth element
"Yes," Iroh said, his neckcloth drawn up to cover his mouth in case of stray sparks. "Technically a waterbender can indeed bend alcohol, my nephew. And I am delighted -- that is, saddened -- to hear that the Water Tribe girl has advanced in her studies. And I quite agree with you that a drunken Avatar is a threat to the entire world and not just a case of retrieving honour. However -- and I want you to remember this -- it was neither the time nor the place to announce your arrival with the usual fire blast."
"Hic," said Zuko, and keeled over.