Coca-Cola or Red Bull Cola is always awesome (Red Bull Cola is definitely better though), but whenever I get the chance, I never hesitate to have a Ting or Red Bull
In case you don't know about their flavors:
Coca-Cola: caramel, coca leaf extract, kola nut extract, lime, vanilla, orange, lemon, cassia, nutmeg oils
Red Bull Cola: coca leaf, kola nut, lemon, lime, clove, cinnamon, cardamom, pine, corn mint, galangal, vanilla, ginger, mace, cocoa, liquorice, orange, mustard seeds
Red Bull: taurine, glucuronolactone, caffeine, B vitamins, sucrose and glucose
In my opinion, Red Bull tastes like sour cotton candy, but everyone says something different
Ting: grapefruit juice, grapefruit flavor
(Bit of trivia information)