I'm addicted to Coca-Cola as well, but you don't have much to worry about because 237 mL is not bad for a day. But, keep in mind - there is caffeine in coke and caffeine is a drug. It is addictive, and the body keeps on asking for more coke because its addicted to the caffeine drug. When you don't have your supply of caffeine, your body goes into withdrawal and you may feel tired and cranky. If you are worried about getting diabetes, try healthier fruit drinks that are just as tasty. Try drinking coke every other day instead of daily. Just try healthier options, and you should be fine. There's no reason to stop drinking coke altogether.