Regal keto Finally, drink water. You have heard it again and again. Why, because it is true. Water has zero calories and ranks number 1 in diet drinks. Other sips add up fast. A cup of cola has 146 calories, a cup of grape juice 154 calories. Replacing sweetened drinks with water can help you lose weight and is better for your health. Drink it ice cold, especially before meals as it helps reduce your appetite. The calorie savings by switching water for sugared drinks is huge. It is estimated that over 7000 calories per week can be saved.