Mountain Dew Merry Mash-Up, the limited-time Slurpee flavor, is available in participating 7-Eleven locations while supplies last. Mountain Dew’s mash-up of two holiday-inspired flavors—cranberry and pomegranate—was introduced last year as a soft drink, but this is the first time Merry Mash-Up is being offered in frozen Slurpee drink form. In addition, Slurpee lovers, Big Gulp drink […]