Is there a clear soda that contains caffeine?

* Mountain Dew Code Red: A clear, cherry-flavored soda from Mountain Dew.

* Sprite: While not technically "clear" due to its slight yellow hue, Sprite is a popular clear soda with caffeine.

* 7 Up: Similar to Sprite, 7 Up is also slightly yellow but is often considered a clear soda. It contains caffeine.

Important Note: While these sodas are clear, the color of the liquid does not always indicate the presence or absence of caffeine. It's always best to check the ingredient list or nutritional information to be sure.