What is your favorite cola ?

So lately Ive been going back and forth between "Coke Zero" and "Pepsi Max" .... supposedly great taste and no calories in each ( Guess the marketing worked on me lol ) and I can't choice definately which I like better, although I lean towards Pepsi Max. One problem I have is you don't always find Pepsi Max everywhere, but you do see Coke Zero.

There are the new "Soda Machines" where you can make your own cola at home ... have you tried one of these  ?

There are other "Colas" like RC - Royal Crown , C & C , Tab, etc


So which is your favorite Cola ?