Brooklyn, NY-based RUNA Tea has unveiled two new flavors of unsweetened bottled tea. The new Guava and Lime flavors are brewed with a native Amazonian tree leaf, or guayusa. These new flavors are the first completely unsweetened teas produced by the four-year-old company. RUNA’s guayusa tea offers as much caffeine as one cup of coffee with twice the antioxidants of green tea. This unique tea blend has been shown to support the immune system, in addition to serving as a digestive aid and appetite suppressant.