There are numerous words that can be used as synonyms for the term "juice filling." Some options include beverage infusion, liquid saturation, drink concentration, fluid replenishment, or quenching. These terms can all be used to describe the process of filling a container with a liquid, such as a glass or bottle, with a fruity or refreshing juice. Using creative synonyms can help to add variety and interest to writing and communication. So, whether you are writing a recipe or describing a beverage, try out some of these synonyms to add some flavor to your language!