Teas can be flavored a number of ways, through the inclusion of ingredients - such as flowers, nuts, or berries, the addition of oils or extracts - such as citrus or vanilla, or by using artificial flavors. After being added to a base tea, these ingredients are blended together in a number of ways, either in large batches in a blending machine or in small batches by hand. Some teas are flavored through their processes, such as Lapsang Souchong, which is smoked over pine fires during drying.