The suit claims Atlanta-based WinCup continues to sell, distribute and market foam products in California despite a state law that was supposed to ban such sales starting Jan. 1.

Founded in 1961, WinCup has grown into a national leader in foodservice packaging products. Over the decades, its foam to-go cups, lids and containers have become a preferred option for many major ...

In his suit, Heavey includes a March 15 receipt from a Smart & Final store in the San Diego County town of National City, indicating a purchase of "WinCup 16 oz. Foam" cups. Similar polystyrene foam ...

Similar polystyrene foam products could be seen on the shelves this week at a Redwood City Smart & Final, including a 1,000-count box of 12-ounce WinCup foam cups selling for $36.99.