Making the world better, one answer at a time. There are sixteen (16) US cups in one U.S. gallon. There are sixteen (16) US cups in one U.S. gallon..
What can be Transmuted? Elements (air, water, earth, fire, shadow and mana), some metals (such as Iron to Gold), primal elements (elements that are converted in stacks to a more powerful single item) and some gems can be transmuted to other types of items.
The Hidden element is attached to otherwise considered non-elemental Materia as the game has fifteen elements: ten main elements that are normally used in the game (and attached to Materia), Restorative used for the healing mechanics, and five other elements that are associated with physical attacks.