a combination of a waste container and a stack of disposable plastic liners for use therein , each liner containing a cardboard insert . the inserts are dimensioned so as to frictionally engage the interior wall surface at or near the bottom of the tapered container and wedge the liners against the container . this frictional engagement prevents the stack of liners from spilling as the container is moved about . the frictional engagement is destroyed by pulling the insert upwardly and away from the interior of the container .