Oca is an all-natural tapioca-based drink enhanced with an extract of cassava root and contains 120mg of natural caffeine. this energy drink is: organic, vegan, naturally sweetened, low sugar, gluten free and kosher containing only 60 calories per can. a long lasting natural energy drink that is healthy and delicious without the crash and burn that is prevalent in an overly saturated energy drink. oca, a plant-based beverage fueled by cassava root extract (tapioca) and flavors inspired by the amazon rainforest. the vibrant spirit of brazil and the tasty richness of amazonian rainforest fruits appear in a burst of color from stunning hand-drawn fruit illustrations that form the brand name and allow the natural, savory flavors of this refreshingly different drink to sing: tap into the root of natural energy. in four magnificent flavors: mango, berry acai, passionfruit guava and prickly pear lime.