I am embarrassed to say I am a bit addicted to the carbonated soft drink Mountain Dew.
It's the BEST!  I love it, too!  I drink Diet Mountain Dew for breakfast!  
Really? Me too! I drink as many as 4 per day. There are other citrus soft drinks, like Mello Yello and Sun Drop, but I like Mountain Dew the best!
Does Mountain Dew have the most caffeine?
Good question -- I think it does. I'm sure more caffeine has been added over the years since it was first invented in 1940! 
Wow - I had no idea it's been around that long! I'm glad our modern FDA hasn't banned it for the artificial food colors and extra caffeine!
Ha, I know. Probably pretty toxic by many people's standards. Did you ever try the cherry flavor called Code Red?