A cover (10) for a medical waste disposal receptacle, said receptacle defining a receptacle open end, said cover comprising: a body portion (12) including a covering surface configured to close said receptacle open end except for an access opening (20) therethrough defined by a front opening edge (21), a rear opening edge (19), and opposed side edges (23, 25) extending between the front and rear opening edges, wherein said body portion includes integrally formed, fixed first and second sloped slide surfaces (32, 42) depending from the covering surface adjacent the access opening, and a lid portion (50) hingedly connected to the covering surface proximate the rear opening edge, the lid portion having a locking tab (56) extending from a support rib (55) wherein the lid portion is adapted to pivot relative to the covering surface to a closed position in which the access opening is blocked wherein the locking tab (56) locks the lid portion in the closed position by extending through a locking bore (36) located on the first slide surface (32) to engage a shoulder (38) wherein the support rib (55) is positioned outside the locking bore (36) when the lid portion (50) is locked in the closed position and wherein the first and second slide surfaces (32, 42) are axially spaced in non-overlapping relation to define a tortuous path extending from the access opening (20), and characterized in that the body portion (12) includes a plurality of locking tabs (17) and corresponding apertures (18) in alignment with the locking tabs (17) such that all components of the cover (10) allow a simple linear separation of the mold components when manufactured.
