John Abraham after some research found out that Diet Pepsi is not harmful to health and incidently is also endorsing it.
You may want to look at this video, starring Diet Pepsi and Mentos, before you decide ...
Check here for fountains with Diet Coke (this one has fancier fountain patterns).
Nope, this is not the case with just Diet colas! Check here for the Mentos+Coke experience.
... whole new meaning to fountain drinks!