Last week, Coca-Cola and Keurig Dr Pepper joined PepsiCo in reassuring investors that — for now at least — US consumers are still willing to spend on packaged refreshment beverages. More importantly, executives at the companies insisted they know how to adjust if consumers get skittish. Coca-Cola reported third-quarter earnings on Oct. 24, followed by Keurig Dr Pepper on Oct. 26. PepsiCo had already reported its third quarter on...