Fully oxidized, black teas are the most popular types of tea on the American market and are available in a wide variety of flavors which vary depending on soil quality, elevation, and time of harvest. Single-estate, loose-leaf teas provide the connoisseur with an array of choices that cannot be found with prepackaged teabags. Black teas can be enjoyed all day-- from a morning pick-up to an evening indulgence after dinner.