I just like having an ice-cold can of carbonated drink on my desk at work. I believe sipping it helps me concentrate, although I would have no good argument why that is.
My parents never had anything else but milk or water or home-made fruit juice in the house when I was growing up (apart from tea and coffee and occasionally a beer for the adults), and getting a glass of Coca Cola at someone else’s house was something special.
For several years I tried to convince the people who filled up the vending machines at my work to include carbonated water in the machine – so I would get the carbonated drink I wanted so badly, minus the sugar and minus the additives.
They resisted fiercly, saying it’s not worth it because people don’t drink it so much. I pointed out that the machine was standing right outside my office, I worked 14 hours a day, 5 days a week, 50 weeks a year, and would probably empty it days before they came to fill it up again. But no chance.
Now I work at a different location (for reasons unrelated to the vending machine, haha) and to my delight I found canned water in the vending machine outside my new office, hurra!
I definitely feel less guilty about my canned drink addiction now, and zero sugar means zero calories, too :-)