Drinks can be classified into three different types, based on the effect they give you upon use. Drinks that give a "Refresh" effect are called Juice. Drinks that give a "Regen" effect are called Milk or Au Lait (French for "with milk"). Drinks that give a "Food" effect do not have a specific name for their classification, and are usually just referred to by the name of the actual drink. "Food" effect drinks often have high quality versions, while milk and juices do not. Drinks do not stack.