A bottle-capping machine is used in industrial production lines to securely apply caps, lids or plugs to bottles and other containers. The type and design of the cap-tightener machine depend on the caps or lid it handles.A bottle cap machine is a machine that tightens or secures a container's cap. Every company that fills products into bottles, containers, or jars needs a way to close the container, and the most common closure is a cap.Capping machines are used to secure caps onto bottles and drums. There are three basic types of equipment: manual, semi-automatic, and automatic. Manual capping machines aid in the setting or holding of products. Operators are responsible for most controls and activities.