"Ready-to-serve" is a term used to describe food or drinks that are prepared and packaged for immediate consumption. If you're looking for some synonyms for this term, there are many options to choose from. For example, "pre-prepared" suggests that the food has been prepared in advance and is ready to be served without further cooking or assembly. "Convenience food" is another option, which refers to products that are designed to be easy to use and save time. "Instant" might also be a good choice, as it implies that the food can be quickly and easily prepared. Other synonyms include "ready-made," "pre-packaged," and "quick and easy".