I think most normal people would go for a mug of mulled cider, tea or cocoa. But of course some of the Society for Creative Anachronism types, who like to drink gruited ale out of drinking horns, heat it up in cold weather as they did back in Mid Evil Tymes. The most authentic way to do that, I’m told, is to insert a red-hot poker for a few seconds. (You just want to warm it, not boil off the alcohol!)