disclosed is a container and closure assembly including a container having a substantially circular opening and an outer wall containing an upper retention bead and a lower , regularly - outwardly extending security ring . the closure includes a one - piece plastic body having a top panel and an encircling skirt depending from the top panel so as to be integrally attached thereto . the skirt includes a groove for locking engagement with the retention bead to retain the closure on the container . a circumferential line of weakness in the skirt wall defines a removable tear strip having a movable free edge and which is removable from an upper portion of the skirt wall by fracturing the skirt wall along the upper line of weakness . a tear strip is weakened so as to form a plurality of circumferentially - spaced segments throughout the substantial entirety of its periphery . the segments are separable one from another in response to a prying or wedging force applied to the tear strip at the free edge thereof .