Abstract: A receptacle for collecting oil drippings from the underside of an inboard engine of a boat. A rectangular sheet of semirigid plastic material has a plurality of hinge lines formed by scoring to provide an integral receptacle defined by a base, sidewalls, and corner members. The sidewalls and corner members are folded flat against the base for insertion beneath the engine. When fully inserted the sidewalls are erected to a substantially vertical position. Retention members are employed adjacent the corners of the receptacle for maintaining the sidewalls in their erected positions and for holding the corner members in place against the outer surface of a respective sidewall. With the receptacle in position, straps integral with the sidewalls are attached to the engine supporting structure for suspension of the receptacle beneath the engine.