Abstract: A flexible plastic bag having two sides, one sealed end, and one openable end. Molding strips consisting at least partly of laminated wire or other malleable material, are removably fixed parallel and adjacent to the edges of the openable end of the bag on the exterior surfaces of each side. Each molding strip extends across the entire width of the bag and each is fixed to the bag surface along its entire length thus forming a deformable reinforcing edge along the entire opening. Resultantly, the mouth of the bag can be shaped into an open position, and the open position will be retained until the molding strips are subsequently reshaped. The purposeful malleability of the bag edge allows its opening to be shaped into other specific configurations as well. Once the mouth of the bag is manipulated to the shape or degree of openness desired, the bag can be filled without undue obstruction or restriction, and the bag can also be passed over objects to encase them without initial frictional contact.