The decades-old duel between Coca-Cola and Pepsi has entered new territory. As the soda behemoths spar for world's top soft drink, the battle isn't just about what's in their bottles. It's about what's in their plastic. In 2009, the Coca-Cola Co. said the bottles in which it sells its Dasani water products would contain up to 30 percent sugar cane-based components. The bottles are made of a plastic called polyethylene terephthalate, or PET. Coca-Cola touted the PlantBottle" as the latest in eco-friendly food packaging. Then PepsiCo dropped a bio-bottle bombshell in March, announcing PET containers that were 100 percent petroleum-free. So far, bioplastics have hardly encroached on that petroleum dependency. Less than 1 percent of plastics used nationally come from biological sources like sugar cane and corn. But researchers predict the market will skyrocket in the next several years because of technological advancements, new manufacturing plants and increased interest in bioplastic packaging. Global demand for plant-based plastics could be 600,000 metric tons by 2013, a 26-fold jump in five years, according to a 2008 report by market research firm Freedonia Group.
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