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Pepsi is working hard to reinvent its image, from launching the Pepsi Refresh Project to producing a line of "throwback" products with sugar instead of high-fructose corn syrup. Now comes the news that the company will be going green in Miami as the Super Bowl gets underway. PepsiCo announced that it will be installing 35 new, hydrofluorocarbon-free (HFC-Free) cooler machines all over the city. The new freezers, the first of their kind in the country, run on less energy than a 100-watt light bulb and use natural gases as refrigerant.

Some of these high-tech wonders will appear in the Sun Life Stadium for the Super Bowl, as well as in the American Airlines Arena (one of the first arenas in the US to become LEED-certified) and at Florida International University. Others will be placed in the usual spots—grocery and convenience stores, for instance—throughout Miami.

The new coolers really are green; they use 44 percent less energy than the machines from 2008, and they're 20 percent more efficient than Energy Star requires. So how do they avoid hydrofluorocarbons? They use Hydrocarbon R290, an alternative refrigerant that emits 99 percent less greenhouse gas.

"PepsiCo is strongly committed to reducing its carbon footprint by reducing greenhouse gas (GHG) emissions in its coolers," said Robert Lewis, vice president of packaging and equipment for PepsiCo. "In addition to reducing energy consumption, we also continue to focus on using natural refrigerants — hydrocarbon (HC) and carbon dioxide (CO2) – to phase out harmful HFCs from our machines."