mcdonald&rsquos will replace all polystyrene beverage cups with paper cups at its 14,000 us outlets in response to a shareholder proposal filed by as you sow in 2011, according to the nonprofit. in 2012, the company agreed to test replacement of its foam cups with a doublewalled paper hot cup at approximately 2,000 restaurants, primarily on the west coast. the paper cup will now become the standard hot beverage cup at all us outlets. as you sow, promotes environmental and social corporate responsibility through shareholder advocacy and innovative legal strategies mcdonald&rsquos began to phase out its iconic clam shell foam hamburger box in 1990 amid controversy about the environmental impacts of polystyrene, but continued to use foam beverage cups. the fastfood chain is already a major purchaser of recycled fiber used in its food containers, bags and napkins. as you sow says it&rsquos also speaking with dunkin&rsquo donuts, which uses foam hot beverage cups. the company recently announced plans to phase out foam cups in two to three years but has not disclosed what materials it will use instead. source httpwww.environmentalleader.com20130926mcdonaldstoreplacefoamcoffeecups