Only available in the United States

Try figuring out the reason why they're unavailable in other countries.

Coca-Cola's Pibb Xtra.

Instead of Pibb Xtra, Coca-Cola sells Dr Pepper in various countries due to a licencing agreement with Keurig Dr Pepper.

Pepsi's Starry.

Instead of Starry, Pepsi sells 7Up in various countries also due to a licencing agreement with Keurig Dr Pepper.