Final answer:
Non-carbohydrate sweeteners are used to make white milk-based drinks sugar-free without adding calories.
Step-by-step explanation:
When a white milk-based drink is ordered sugar-free, non-carbohydrate sweeteners can be used to add sweetness without adding calories. Some examples of non-carbohydrate sweeteners are saccharin, sodium cyclamate, monallin, and aspartame. These sweeteners are often used in the milk powder supplied to children with lactose intolerance.
In North America, colored paper packets are provided for restaurant customers to add sweeteners to their beverages. The colors typically correspond to different sweeteners, such as blue for aspartame, pink for saccharin, yellow for sucralose, orange for monk fruit extract, and green for stevia.