At only five calories and one gram of sugar per serving, Bai Antioxidant Supertea still manages to be sweet without any artificial sweeteners. 

Each bottle of iced tea features stevia — a natural, plant-based substitute for sugar — and is infused with antioxidants courtesy of coffee fruit, the company's "not-so-secret" superfruit. Exotic flavors range from Brasilia Blueberry to Panama Peach but our favorite is Paraguay Passionfruit Tea. During our taste test, it was the most drinkable flavor with a soothing, fruity aroma and equally fruity flavor that didn't leave much of a stevia aftertaste.