50 u2032 the snap engagement feature 50 u2032 cooperates with the tabs 31 a 31 b of the container 10 to create a snap fit engagement between the cap 60 and the container 10 in certain embodiments the snap engagement feature 50 u2032 is formed on the surface of the cylindrical body 62 where it transitions to the bell shaped bottom region 63 and includes a raised snap bead 51 u2032 a notch 52 u2032 and a raised stop member 53 u2032 in certain embodiments there are two such snap engagement features 50 u2032 spaced apart 180 u00b0 each capable of cooperating with a respective one of the tabs 31 a 31 b of the container 10 as the cap 60 is rotated with respect to the container 10 the tab 31 a approaches the snap fit engagement feature 50 u2032 until it is raised axially by raised snap bead 51 u2032 further relative rotation in the same direction causes the tab 31 a to drop into notch 52 u2032 still further relative rotation causes the tab 31 a to about against side wall 54 u2032 of raised stop member 53 u2032 creating a backstop the abutment of the tab 31 a against the side wall 54 u2032 causes an audible u201c click u201d sound as well as tactile feedback to the user warning the user to cease the rotation thereby preventing over torquing the tab 31 a sits in the region of notch 52 u2032 when the cap 60 is in the.