PurBlu Brands launched Tonic, a 100 percent natural health shot designed as a healthy alternative to energy shots to provide an all-natural botanical boost, the company says. The functional beverage features vibrant packaging with blue tones for the Calm variety, reds for Immunity, greens for Detox, oranges for Focus and yellows for Energy. Key ingredients are featured on the neck of the bottles to keep the natural claim front and center for consumers, it says.