Artie makes a comment about Claudia being a 16-year-old girl in which she corrects him stating she is 19. In Season 1 Episode 4 during a flashback vision of Artie's, you notice Joshua stating that Claudia forgets how to be a 10-year-old girl. It's also noted that Joshua has been missing for 12 years which would put Claudia at 22 years old.
Further, in Episode 5, Claudia goes to Las Vegas and wins some "spending money." She would not have been able to gamble, much less enter a casino unless she was 21.
The Goblet of Severan used to disorient people is held by the bowl and rubbed. Usually a sound will only be produced if the bowl is not touched while being rubbed.