Today's lunch was cheese sandwich with some fries, and I realized that a Coke would be the absolute most-wanted drink with that. And there's a bunch in the fridge (for my son). And I'm a bit tired of milk, tea and water (my other options).
So I had a Coke with lunch. And, ya know, it really wasn't anywhere near as tasty as I imagined it would be. Convenient I guess, but after this it's going to be even easier to stick to the alternatives.
Heart-wise, I haven't noticed any change one way or the other, so it's probably not caffeine, and may well be nothing more than that one of my three part-times jobs involves a lot of waiting around in a really quiet place.