A substantially crimpless and monolithic paperboard container lid and method of making same is provided. The lid comprises a single contiguous molded paperboard body configured to conformingly couple to a top periphery of a container for covering the container's opening. The body includes a sealing ring located adjacent the body's periphery. The sealing ring includes a sealing channel composed of a radiused cross-section that extends to a tangent ring terminating with a tab ring. The radiused cross-section and tangent ring assist providing a snug fit between the lid and the container. Despite being made from paperboard, the lid does not include one or more substantial crimps in the sealing ring. Having no substantial crimps, the lid fits onto the container and prevents fluid from leaking between the container's periphery and the lid.