Abstract: There are provided a flexible container capable of realizing facilitation of opening and uniformization of the shape of an opening that is obtained by opening, a method of forming the flexible container, a seal-breaking guide of the flexible container, a method of enclosing a liquid in the flexible container, and the liquid enclosed in the flexible container.

Abstract: There are provided a packing material capable of removing an odor, and preventing deterioration in quality of the contents, due to an odor, excellent in mechanical strength and environmental conservation, and available at a low cost, a flexible container using the packing material, a method of forming the flexible container, a method of enclosing a liquid in the flexible container, capable of removing an odor, and preventing deterioration in quality of the contents, due to an odor, and the liquid enclosed in the flexible container. The packing material (a flexible material 2, laminated film 12) has tearableness, and is a laminate or includes the laminate, the laminate comprising a heat seal layer 4 (for example, a PE film 14) having heat seal property, a gas shut-out layer 6 (for example, a CPET film 16) having gas shut-out property, and a protective layer 8 (for example, an NY film 18) having a mechanical strength, wherein the heat seal layer is exposed in the surface of the laminate.