Coke tastes so bad since they stopped using sugar. You could get it made from sugar at kosher food stores for awhile but no longer. Tastes awful now. I switched to water and loast five pounds in a couple of weeks.
If you have any "Cost Plus" stores in your area, check 'em out and look for "Cane Cola." It's what Coca-Cola used to be in the States. I buy a couple of four-packs whenever I feel like living dangerously. (Diabetic here.)
Oh, and one of the dealiest (they call it "mortal" in Mexico) and worst tasting drink is US-made Diet Coke. Ugh!