This document analyzes the competition between Coca-Cola and Pepsi using various frameworks including Porter's Five Forces, PEST analysis, and the resource-based view. It finds that Coca-Cola and Pepsi dominate the soft drink oligopoly through brand loyalty and large marketing budgets that create barriers to entry. While demand is slowing domestically, growth opportunities exist in international markets like China. Both companies operate in fast economic times and imitate each other's strategies, though their secret cola formulas and brand images remain rare and valuable resources.