“I had contemplated doing that but I wasn’t sure that any of the cola syrups for making your own were sugar based, rather than corn-syrup based.”
I use tea or coffee. Make both to taste and serve cold. Soda is too sweet and it upsets my stomach. If you’re off it for a while and then try some, it will taste like malted battery acid. You’ll wonder why you ever drank it. Also, if you look at the sugar content, it’s a wonder we’re not all diabetic.
I put a ton of ice in each glass I drink to dilute it. ALso take fenugreek before drinking it to deal with the sugar.