Receptacle for receiving infectious waste material

A disposable waste receptacle comprising:

• a substantially imperforate container for holding the waste and having an edge defining an opening, the edge including a lip structure having a U-shaped flange extending along the entire edge;
• a substantially flat cover overlying said opening and including pawl means for engaging said lip structure to nonreleasably lock the cover in place over the opening, the cover including-
• a generally flat top portion having an outer periphery and a socket;
• a depending flange along the outer periphery of the top portion, with the flange adjoining the edge of the container;
• a recess in the top portion inwardly spaced from the outer periphery of the top portion;
• a substantially flat shoulder surface in the recess generally parallel to the top portion;
• an open trough extending through the shoulder surface with the shoulder surface surrounding the trough and having convergingly tapered wall structure extending into the container;
• an engagement slot extending through the shoulder surface;
• a lid hingedly coupled to the top surface for movement between a first position remote from the trough and a second position overlying the trough,
• the lid having a stud for operative engagement of the stud in the top socket with the lid in the first position to releasably retain the lid in the first position,
• the lid having a projecting lug operatively received in the engagement slot with the lid in the second position, the lug and slot operative to prevent return of the lid to the first position once the lug is received in the slot,
• the lid being cooperatively dimensioned to the recess for reception therein, such that, in the second position, the lid adjoins the shoulder surface and the cover and lid are generally flat in relation to each other.