Historically when humans drank from the skulls of the deceased, it was generally from the calvaria, also known as the skullcap. Ironically, that's the part that's missing from this mug. Don't act all shocked that we're talking about it. After all, you're on a page entitled "Skeleton Face Resin Mug." What'd you expect? A coffee mug with a 70s-style "hang in there" kitten on it? Not so much.