Diamond Foods has come out of its shell. While the company still sells plenty of walnuts, peanuts, almonds, and other varieties of nuts, primarily under the Diamond and Emerald brands, snacks are a growing part of its business. Diamond Foods sells microwave popcorn under the Pop Secret brand and Kettle brand potato chips. The snack food maker sells its products to food retailers; Wal-Mart and Costco combined account for about 25% of sales. Non-retail customers include food processors, restaurants, bakeries and food service operators. Snack maker Synder's-Lance, the maker of Cape Cod chips, Lance crackers, and Synder's of Hanover pretzels, acquired Diamond Foods for $1.3 billion in early 2016.