By Felicity Clarke, Senior Contributing Reporter
RIO DE JANEIRO - With its potent cachaça kick laced with sweet sugar and a razor sharp lime edge, the caipirinha is Brazilian party spirit in a glass (or plastic cup) and a befitting national drink. However, the various mutations on the theme that have seen cachaça replaced with, most frequently, vodka and other international spirits have caused some to worry about the future of the caipirinha soul.
In an effort to protect it, the Save the Caipirinha campaign was launched last month and has . . .