A single-use cup undergoes a rigidity test at the Tryer Center at Starbucks headquarters, Wednesday, June 28, 2023, in Seattle. Paper pulp from recycled cups has shorter fibers than virgin pulp, which means less rigidity, important particularly with hot coffee. Part of the company's goal is to cut waste, water use and carbon emissions in half by 2030. (AP Photo/Lindsey Wasson)