After launching acai-infused energy drinks 28Black and 28White in Germany in 2008, Calidris 28 AG has launched the products in the United States. 28Black and 28White are lightly carbonated, all-natural and do not include taurine, artificial flavors or preservatives. 28Black contains Q10, vitamins B6 and B12, guarana, and isomaltulose, a natural form of sugar that is found in honey and sugar cane, the company says. 28White is a zero-calorie, sugar-free, stevia-sweetened version of 28Black. The beverages are named for their ability to provide energy to consumers, adding four more hours to the day, the company says.