Abstract: A system for reusing paint cans comprising a paint can with a circular groove lip seal, a flexible plastic film bag liner to cover the interior surfaces of the can and with the opening of the bag folded back and draped downwardly over the upper outside portion of the can; and a semi-flexible plastic lid for said can having two downwardly depending concentric rings as shoulders bearing respectively against the outer and inner edges of said lip seal in a liquid-tight sealing relationship.