Of that amount, $765 million came from Central Europe, the Middle East and Africa; analysts expected $764 million. The news was even better for PepsiCo, Inc. (NYSE: PEP ). For the same regions, the company's second-quarter sales came in at $1.87 billion, compared with analyst estimates of $1.8 billion. So while Sodastream International Ltd (NASDAQ:SODA)'s numbers are impressive on a percentage basis and the concept may be eroding some of Coke's and Pepsi's market share in the U.S. and Western Europe (atleast psychologically), a home soda fountain may not be on the list for an emerging middle-class family in, say, Ghana. Flickr/Sean Loyless According to Forbes magazine, Coke is the world's third most powerful brand. Pepsi is only No. 27 on the same list. Middle-Class Explosion Frontier market middle class is defined as someone earning $5,000 to $15,000 a year. I'm focusing on Africa because it is probably the most underdeveloped and has the most potential of frontier markets.