Kool-Aid is launching electrolyte packets made without artificial dyes, aimed at reaching consumers who want to hydrate, but not for Gatorade or Liquid I.V. prices. The new product is part of parent company Kraft Heinz's broader plan to modernize its portfolio and reverse a sales slump that has lasted nearly a decade. Its top brands, including Capri Sun, Oscar Mayer and Kraft Mac & Cheese, have struggled as consumers have sought fresher and more nutritious options to feed and hydrate their