[TheLocehiliosan]

I do this some days when my last cup of coffee has gone cold. I’ll add Diet Coke to the coffee.

I enjoy it.

[rvba]

So it is more like a "sweetener for the coffee".

Not, "adding caffeine kick to a cola". On a side note, is that even possible, wouldnt all the CO2 fly away, assuming you poured cold coffee? Im considering trying it, suspect this might be quite terrible.