CHICAGO – In keeping with its pledge to find an alternative to its foam cups, Dunkin' Donuts is testing recyclable-plastic versions to see if they can withstand temperatures of 200 degrees Fahrenheit while remaining eco-conscious, Bloomberg BusinessWeek reports.

About 100 Dunkin’ locations are using the polypropylene cups in New York, Vermont, Massachusetts and California, Scott Murphy, chief supply chain officer at Dunkin' Brands Group Inc., told the news source, adding that the company could make a decision on an alternative in 2015 and begin a nationwide rollout in 2016.

"Consumers want a more environmentally friendly product," Murphy told Bloomberg, adding, "But they don't want to sacrifice the performance of the current foam cup."

He noted that polypropylene cups are sturdy, don't require a cardboard sleeve and can be recycled through most curbside programs. However, he said that they’re more expensive than foam cups.

"We've been working on this for five years," Murphy told the news source. "It's an interesting problem."