Cold drinks:
Diabetics should avoid drinking cold drinks with lunch. The reason is that soft drinks contain a lot of artificial sweeteners, which are harmful to health. So, it is best to avoid drinking soft drinks at noon. Similarly, fruits with high sugar content should not be eaten, for example, mango, banana, jackfruit, litchi, etc.
What to eat?
If you are diabetic, include nutrient-rich foods in your lunch. But, protein and fiber in equal amounts... Take carbohydrates in moderation. Never forget this.
Although carbohydrates are beneficial, it varies depending on the food we eat. So, for this you can take brown rice, oats, quinoa, etc. Most importantly, always eat a balanced diet. It helps a lot in keeping the blood sugar level under control.