In 1970, Charles and his brother sold Sewell Plastics to The Dorsey Corporation, and he remained with the company as the President. Due to the relationship between The Dorsey Corporation and The Coca-Cola Company, Sewell Plastics was able to manufacture and supply the first 2-liter carbonated beverage container ever filled and sold by Coca-Cola in 1977. Charles left Sewell Plastics in 1982 and upon his completion of his non-compete contract, he established CKS Packaging in 1985.