In this articlePEPUtah-based drink chain Swig coined "dirty soda" back in 2010. Fifteen years later, the trend is fueling innovation everywhere from PepsiCo to McDonald's, infusing the sluggish beverage category with new life."Dirty soda" drinks use pop as a base, followed by flavored syrups, cream or other ingredients. While Swig claims credit — and the trademark — for dirty soda, TikTok videos and the reality TV show "The Secret Lives of Mormon Wives" have helped the trend spread far and wide, outpacing e ...