Patent ID: 8016159

Claim:
A closure for a container having an opening, said closure comprising: a base cap including a cylindrical structure having an annular groove, an overcap having a locking structure rotatably received within said groove to axially fix said overcap with respect to said base cap, said base cap including an outer skirt having container-engaging structure, a cylindrical well defining a chamber for containing and supporting a consumable or other item located therein, a frangible membrane connected to said well along an inclined line of weakness and by a hinge member within said well, said hinge member having a pocket extending downward adjacent lower and upper terminuses of said line of weakness, said base cap cylindrical structure having an upwardly inwardly directed projection at an upper surface thereof defining a minimum diameter, said overcap including a body having gripping structure, an inner skirt received within and rotatably positioned relative to said well, and a cutting member depending from a lower end of said inner skirt substantially received within said pocket such that said cutting member extends below said lower terminus when said base cap is assembled to said overcap, whereby said cutting member severs said line of weakness upon substantial rotation of said overcap with respect to said base cap, said overcap inner skirt having an upper and lower portion, said upper portion being thickened to have an increased outside diameter as compared to said lower portion, and said increased outer diameter forming a seal with said minimum diameter of said cylindrical structure projection against penetration into said well.