Nobody works harder than the R&D department at a major soda company. Sitting still is not an option in an industry like this. It's not enough to simply rely on age-old recipes — no matter how classic ...

Some flavors fizzled.

Add Yahoo as a preferred source to see more of our stories on Google. If you jumped on the baked feta pasta wave or tracked down birria tacos at their peak, dirty soda deserves a spot on your radar.

Dirty sodas might commonly be associated with coming-of-age generations, but research shows that could be changing.