"Re serves" is a term that refers to a portion of something that has been set aside for future use, typically in the context of food or drinks. The antonyms for this term would be words that describe the opposite of reserving or saving, such as using, consuming, depleting, or exhausting. These words imply that something is being used up or spent rather than being saved or set aside. Other antonyms for "re serves" could include waste, squander, dispose, or get rid of, all of which suggest that something is being thrown away or gotten rid of rather than being saved for later use.