Nestable cup

Claim 1

A ONE-PIECE NESTABLE SEAMLESS CONTAINER OF THINWALL PLASTIC MATERIAL OF SUBSTANTIALLY UNIFORM THICKNESS, COMPRISING A BOTTOM AND A SIDE-WALL OF PREDETERMINED THICKNESS INTEGRAL THEREWITH, THE CONFIGURATION OF SAID BOTTOM IN CENTRAL AXIAL CROSS-SECTION BEING SUCH AS TO ENHANCE ITS RESISTANCE TO DEFORMATION, SAID SIDEWALL BEING JOINED TO SAID BOTTOM AT A CIRCUMFERENTIAL BOTTOM MARGIN AND TAPERING GENERALLY UPWARDLY AND OUTWARDLY THEREFROM IN DIVERGING RELATION TO AN UPPER MARGIN DEFINING AN OPEN UPPER END, SAID SIDEWALL BEING OF SUBSTANTIAL HEIGHT TO PERMIT GRIPPING THEREOF BY A USER, SAID UPPER MARGING HAVING A RIM OF PREDETERMINED AXIAL EXTENT WHICH IS OF SUFFICIENT INCREASED LATERAL WIDTH RELATIVE TO THE THICKNESS OF THE THIN PLASTIC SIDEWALLS TO LEND REQUIRED LATERAL STRENGTH AT SAID OPEN UPPER END, SAID SIDEWALLS HAVING CIRCUMFERENTIAL STACKING RING MEANS FORMED THEREIN, POSITIONED BELOW AND SPACED AXIALLY FROM SAID UPPER RIM AN HAVING AN AXIAL EXTENT GREATER THAN THE AXIAL EXTENT OF THE RIM PORTION AND SUBSTANTIALLY LESS THAN THE HEIGHT OF SAID SIDEWALL, SAID STACKING RING MEANS INCLUDING A CIRCUMFERENTIALLY DISPOSED INTERMEDIATE SUPPORT SECTION HAVING AT ITS LOWER EXTREMITY CIRCUMFERENTIALLY DISPOSED EXTERNALLY PROJECTING SHOULDER MEANS AND HAVING AT ITS UPPER EXTREMITY CIRCUMFERENTIALLY DISPOSED INTERNAL SHOULDER MEANS PROJECTING INWARDLY FROM THE CONTAINER SIDEWALL AND OF SMALLER MINMUM DIAMETER THAN THE MAXIMUM DIAMETER OF SAID EXTERNAL SHOULDER MEANS AND SPACED UPWARDLY FROM SAID BOTTOM, SAID SMALLER DIAMETER BEING LESS THAN SAID GREATER DIAMETER BY MORE THAN TWICE SAID SIDEWALL THICKNESS, SAID INTERNAL SHOULDER MEANS ADAPTED TO FROM A SHELF TO COACT WITH THE COMPLEMENTARY EXTERNAL SHOULDER MEANS OF A LIKE CONTAINER TO POSITIVELY LIMIT THE EXTENT OF TELESCOPIC ASSOCIATION OF SAID CONTAINERS AND THE MAXIMUM DIAMETER OF THE CONTAINER IN THE VICINITY OF SAID EXTERNAL SHOULDER MEANS BEING SUFFICIENTLY LESS THAN THE DIAMETER OF THE INTERNAL CONTAINER WALL SURFACE ADJACENT AND ABOVE SAID INTERNAL SHOULDER MEANS TO COUNTERACT JAMMING OF LIKE CONTAINERS WHEN STACKED, BOTH SAID INTERNAL SHOULDER MEANS AND SAID EXTERNAL SHOULDER MEANS BEING SUBSTANTIALLY CIRCUMFERENTIALLY CONTINOUS, SAID INTERMEDIATE SECTION OF THE STACKING MEANS INCLINED INWARDLY AND UPWARDLY TOWARD THE CUP AXIS TO PRESENT THE AFORESAID INNER SHOULDER MEANS AND TO PROVIDE A THIN-WALL, RESILIENT SUPPORT THEREFORE WHEN AXIAL PRESSURE IS APPLIED THEREAGAINST BY THE EXTERNAL SHOULDER MEANS OF A LIKE, TELESCOPICALLY ASSOCIATED CONTAINER.