Just ADD Water is a phrase that has been used to describe a variety of products and services. It is most commonly associated with instant food and beverage mixes, such as powdered drink mixes, soup mixes, and cake mixes. The phrase implies that the product can be quickly and easily prepared with minimal effort. Just ADD Water is also used to describe other products and services, such as cleaning products, gardening products, and even business services. In all cases, the phrase implies that the product or service can be quickly and easily used with minimal effort.