Executives at Coca-Cola tasked with addressing weak earnings in 2015 should forget about saving pennies from eradicating employee voicemail, and start studying Pepsi. To boost sales in its slow growth soda business, Coca-Cola has led by introducing smaller cans that contain less liquid and calories. On the other hand, a Pepsi exec told TheStreet in November that its Tropicana business will see news in 2015 around sparkling juices and waters. Protein as an ingredient will be used across more beverages. With its traditional soda business out of fizz, Coca-Cola should employ another Pepsi tactic: begin building a snacks business. Pepsi Chairman and CEO Indra Nooyi has proven why owning businesses such as Quaker Oats and Frito Lay are so important to a carbonated drink maker. Some of Pepsi's new products like Quaker Express Cups and Smartfood Delights have premium prices and a healthy angle, allowing it to counteract sluggish sales of carbonated beverages. Brian Sozzi reports.