PepsiCo said yesterday it has completed its merger with The Quaker Oats Company, creating a $25 billion food and beverage company sharply focused on the rapidly growing consumer demand for convenience. "This is an historic day for PepsiCo," said Steve Reinemund, PepsiCo chairman and chief executive officer. "Since this merger was announced in December, we've been making plans to build a truly outstanding company that's perfectly positioned to build on the many opportunities we see for convenient foods and beverages.