Sturdy, stylish cups make a positive impression, both aesthetically and environmentally. Each cup is constructed entirely of NatureWorks Ingeo biopolymer, a renewable plant-based resin that most people can’t tell apart from petroleum-based plastics. Rolled rim and stable base ensure sipping comfort and set-down stability. Old-Fashioned Cup. Cup Type: Cold; Capacity Volume: 9 oz; Materials: NatureWorks Ingeo Biopolymer Resin; Colors: Clear.