One set of glass or crystal phials are part of the required equipment for classes at Hogwarts School of Witchcraft and Wizardry. One place first-years can acquire them are in Wiseacre's Wizarding Equipment in Diagon Alley: glass phials cost three Galleons and crystal phials cost seven.
There are quite possibly many different sorts of phials, but the two known sorts are made of glass and crystal.
- Harry Potter and the Philosopher's Stone (First mentioned)
- Harry Potter and the Chamber of Secrets (film)
- Harry Potter and the Half-Blood Prince (film)
- Harry Potter and the Deathly Hallows: Part 2
- Harry Potter Trading Card Game
- Harry Potter: Hogwarts Mystery