Diabetics should try not to drink Coke Zero, which also has calories and can lead to an increase in blood sugar. Encourage diabetics to drink more plain water or drink green tea, flower tea, lotus leaf, winter melon skin tea, etc. These teas are rich in vitamins and trace elements, which are good for improving metabolism. Diabetics can’t drink with cola, coffee, and fruit juices, which will interfere with the metabolism of blood glucose, further increase blood glucose, and make them prone to acute as well as chronic complications of diabetes. As long as diabetic patients do not have edema, no chronic hepatic insufficiency, renal insufficiency and cardiac insufficiency, patients are encouraged to drink more plain water, which is conducive to the metabolism of blood glucose.