The ASTM F1115-16 (2023) standard defines two test procedures for the determination of carbon dioxide (CO _ 2) loss in beverage containers. Procedure A is used to develop beverage container designs to evaluate Encasement's shelf-life function by measuring CO _ 2 loss with high-precision pressure and temperature monitoring equipment. Procedure B is used as a simpler quality control tool to monitor and maintain the required CO _ 2 pressure during beverage filling to ensure product taste and mass. This standard applies to the measurement of CO _ 2 loss in plastic beverage containers after a specified storage time, involving factors such as Encasement's volume expansion and gas transport characteristics. Test results are expressed in SI units, this standard does not cover all safety issues, and users need to ensure compliance.