Nestable cup

Claim 1

A ONE-PIECE NESTABLE CIRCULAR CUP OF THIN WALLED PLASTIC CONSTRUCTION AND OF A SIZE TO BE GRIPPED AND LIFTED BY ONE HAND, COMPRISING A RECESSED BOTTOM AND A SIDEWALL INTEGRAL THEREWITH, SAID SIDEWALL BEING JOINED TO SAID RECESSED 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 UPPER MARGING HAVING A RIM OF PREDETERMINED AXIAL EXTENT WHICH IS OF SUFFICIENT INCREASED THICKNESS 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, POSITIOINED BELOW SAID UPPER MARGIN AND HAVING AN AXIAL EXTENT GREATER THAN THE AXIAL EXTENT OF THE THICKENED RIM PORTION, SAID STACKING RING MEANS HAVING AT ITS LOWER EXTREMITY CIRCUMFERENTIALLY DISPOSED EXTERNALLY PROJECTING SHOULDER MEANS AND HAVING AT ITS UPPER EXTREMITY CIRCUMFERENTIALLY DISPOSED INTERNAL SHOULDER MEANS OF SMALLER MINIMUM DIAMETER THAN THE MAXIMUM DIAMETER OF SAID EXTERNAL SHOULDER MEANS AND SPACED UPWARDLY FROM SAID RECESSED BOTTOM, SAID INTERNAL SHOULDER MEANS ADAPTED TO FORM 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, AT LEAST CIRCUMFERENTIALLY SPACED PORTIONS OF SAID STACKING RING MEANS LOCATED BENEATH AND PROVIDING A SUPPORT FOR SAID INTERNAL SHOULDER MEANS, SAID SUPPORT CONVERGING TOWARD THE CUP AXIS FROM BOTTOM TO TOP SUFFICIENTLY TO INCREASE LATERAL STRENGTH OF THE STACKING RING MEANS AND TO INCREASE RADIAL EXTENT OF THE INTERNAL SHOULDER MEANS, AND AT LEAST ONE OF SAID SHOULDER MEANS HAVING SEPARATE MEANS ASSOCIATED THEREWITH FOR COOPERATION WITH A SHOULDER MEANS OF A NESTED CUP TO PROVIDE A CIRCUMFERENTIALLY DISCONTINUOUS AREA TO ASSURE AIR COMMUNICATION BETWEEN COMPLETELY NESTED CUPS AND CONSEQUENT FREEDOM OF INDIVIDUAL CUP SEPARATION FROM A STACK, THE INHERENT FLEXIBILITY OF THE THIN PLASTIC MATERIAL OF THE CUP IN COMBINATION WITH THE AFORESAID STRUCTURAL FEATURES SERVING IMPART RESILIENT ACTION TO A STACK OF NESTED CUPS WITHOUT JAMMING WHEN SUCH CUPS ARE SUBJECTED TO AXIAL PRESSURE.