Crystal Pepsi, a caffeine-free, clear version of the cola was sold for a brief time in the early 1990s and then discontinued. Since then, it’s returned only a few times for limited runs.

So for now, a 12-fluid-ounce can of Pepsi Zero Sugar in the U.S. has 38 milligrams of caffeine, while the same-size product ...

Don’t get me started on Pepsi Free, the caffeine-free version that Marty McFly tries to order in Back to the Future, only to have the 1955 diner employee tell him he has to pay for it.

Pepsi is replacing Sierra Mist, a lemon-lime soda brand that launched in 1999, with the new lemon-lime soda brand called Starry. The new caffeine-free soda is the latest beverage brand in Pepsi ...