This report serves as a guide to assist researchers in the selection of beverage intake assessment methods. The report begins with a description of several key issues to consider when assessing beverage intake in children and adolescents, and then moves into a review of five methods for assessing beverage consumption. The review compares assessment methods by describing advantages and disadvantages to each, and also describes how to implement the methods. Resources are also provided to help researchers implement questionnaires and screeners, specifically, as a beverage intake assessment method in their own work. An overview is given of the assessment methods currently used in the scientific literature to assess children’s beverage intake, along with the properties of each method.