Bring 16 ounces of fresh, filtered water to a full boil (212°F). Rooibos benefits from fully boiling water, which helps extract its naturally sweet flavor and beneficial antioxidants. Measure 2 teaspoons blueberry rooibos loose-leaf tea (or tea of choice) and place it in a teapot or infuser. If using a sachet, choose one sized for a larger mug or 16-ounce serving.