Abstract: A container to receive draining fluids characterized by a flexible base and sidewall, and a relatively stiff annulus portion surrounding the base and attached to the sidewall to provide a receptacle. The annulus portion, with the sides and mouth of the container draped over and outside it, forms a free-standing perimeter of sufficient depth, diameter and stability to receive fluids being freely drained into it as from an automobile or tractor radiator, crankcase or transmission. When the draining is completed, the mouth of the container may be sealed to prevent leakage. A resealable, flexible tube is incorporated near the base of the container to serve as a drain spout.