The "dirty soda" trend, popularized by Utah-based chain Swig, has revitalized the beverage industry by combining sodas with flavored syrups and cream, leading to new product innovations from major companies like PepsiCo and McDonald's. As the trend grows, restaurants and eateries are increasingly incorporating dirty sodas into their menus, appealing to younger consumers and helping to reverse the decline in soda consumption in the U.S.