liner 18 tabs 78 82 and recesses 80 84 of this embodiment assist in maintaining alignment between the base 16 and receptacle 12 such that the force exerted upon the receptacle by the user is transmitted axially through the assembly rather than permitting the receptacle 12 to torque relative to the base 16 and become unstable a second alternative embodiment of the present invention is shown in fig1 and fig1 in this embodiment of the invention the receptacle 12 has a concave region 86 with a base 16 and a bellows 36 fitted at least partially within the concave region 86 the concave portion 86 permits access to the bellows 36 by the user the valves 40 41 extend inwardly from the base 16 as best appreciated with reference to fig1 this embodiment also includes a pressurization device 88 the pressurization device 88 includes a one way valve 90 having a surface 92 and a stem 94 with a hook portion 96 the hook portion 96 is fitted into an opening 98 in the receptacle 12 to secure the one way valve 90 in place about the opening 98 is a plurality of air passages 100 the pressurization device 88 operates to release the vacuum created between the liner 18 and the receptacle 12 as the user removes the liner 18.