a device which may be conveniently utilized to collect oil drained from an engine crankcase includes a fluid impermeable plastic bag and a rigid drain stand . the drain stand is designed to hold the bag below the oil drain in a manner facilitating flow of oil into the bag while simultaneously preventing larger objects , such as the drain plug , from also falling into the bag . this drain stand is further preferably constructed of a single sheet of corrugated fiberboard material which may be shipped or sold in a flattened or collapsed configuration , and then unfolded and assembled with the bag by the end user . a unique locking mechanism is provided for joining portions of the corrugated fiberboard sheet without adhesives to form a strong , rigid structure . after the oil has been completely drained into the bag , the bag can be removed from the drain stand , sealed , and then disposed of in an ecologically sound and safe manner . r