Final answer:
If a customer orders a drink 'skinny' that is usually made with chocolate milk, suggest using an alternative milk option like almond milk or skim milk.
Step-by-step explanation:
If a customer orders a drink 'skinny' that is usually made with chocolate milk, they are requesting a version of the drink that is lower in calories and fat. In this case, you can suggest using an alternative milk option like almond milk or skim milk. These options can be used to substitute the chocolate milk without compromising the overall taste of the drink. Remember to ensure that the customer is aware of any potential differences in flavor when making the substitution.