Which key information is necessary to ring up a customer's drink order?

To accurately ring up a customer's drink order, it is essential to capture specific details about the order itself. This includes the size of the drink, which directly impacts pricing, the type of drink being ordered, and any specific customizations the customer may request, such as changes in ingredients, sweetness levels, or milk options. Additionally, obtaining the customer's name helps in personalizing service and ensuring the order can be correctly identified when ready.

This combination of information is crucial for processing the transaction smoothly and efficiently while also providing excellent customer service. By focusing on these details, staff can ensure that the order meets the customer's expectations and avoids potential mistakes during preparation. Other options, while they may carry some relevance, do not encompass the complete picture necessary for efficiently ringing up an order.