The document discusses the ongoing competition between Coca-Cola and Pepsi in the carbonated soft drink industry. It provides background on the industry structure, noting that Coke and Pepsi dominate as concentrate producers while bottling operations are carried out by other companies. The intense rivalry between Coke and Pepsi has driven up advertising spending and innovation, strengthening their brands while weakening smaller competitors. Despite declining demand for sugary drinks, Coke and Pepsi may be able to sustain profits by diversifying their product lines and marketing to address health consciousness.