Like Gates, Musk also appears to be a fan of Diet Coke. Musk posted a photo on X in 2022 of what he said at the time was his bedside table. The picture included four cans of caffeine-free Diet Coke.

This time, it's promising more than twice the original caffeine content. Once marketed as an alternative to Coca-Cola and Pepsi, Jolt Cola will now join the crowded energy-drink market with the ...

Fanta, which is owned by Coca-Cola, comes in fruity flavors like orange and grape, all of which are caffeine-free. And if you ...