Everyone should have at least 2 liters (or 4 pints) of water a day. You can also have tea and coffee with or without milk or cream. We recommend using stevia or monk fruit as sweeteners instead of sugar. Both of them are plant-based and don't contain any calories. Xylitol is also a preferable choice as it is a dental protectant and it provides usable energy.
Try to avoid fizzy drinks and juices. Diet soda doesn't contain real sugar or calories. However, it does contain a lot of additives and artificial ingredients, including sweeteners. These ingredients are full of unnatural chemicals that can cause your body to crave more high-calorie and sugar-laden foods. Because of that, it is better to avoid such drinks.
Alcoholic beverages (except for strong ones like vodka and whiskey) are relatively high in carbohydrates, and you should avoid them. A glass of dry white wine can be an excellent choice during dinner.