Patent ID: 8556111

Claim:
A flexible, closed container comprising a bottom wall, a top wall and four side walls of a substantial rectangular configuration and made of a flexible plastic sheet material, said container comprising at least a first port, said bottom, top and side walls being provided by four separate sheets which are joined together at their edges, wherein a first sheet fully forms said bottom wall, a second sheet forms said top wall and a third and a fourth sheet form a first and a second side wall at two opposite sides of the container, said four sheets each comprising in addition to the portions forming the bottom, top and first and second side walls integrally formed triangular or trapezoid shaped wall portions at opposite ends thereof, said triangular or trapezoid shaped wall portions form when joined together a third and a fourth side wall, respectively, and wherein the first sheet fully forming the bottom wall has a flat face having first and second opposing edges joining the first and second side walls and opposing third and fourth edges each funning a base of triangular or trapezoid shaped wall portions at the opposite ends of the container, the flat face being free of seams between the first and second opposing edges of the bottom wall joining the first and second side walls, and free of seams between the opposing third and fourth edges of the flat face forming the bases of the triangular or trapezoid shaped wall portions at the opposite ends of the container; wherein said bottom wall accommodates said first port in an off-centre position; the port being manufactured from a plastic material compatible with the plastic material of the sheet material, wherein the port is bonded to the bottom wall, the container having an outer surface and further comprising a plastic supporting element attached to the container on the container's outer surface at the first port, the supporting element supporting a portion of the bottom wall of the container, wherein the supporting element comprises a recess and elastically deflectable legs and is attached to the container on its outer surface at the first port via a snap fit; wherein the first port has an end opening into the container, and the first port comprises, at the end opening into the container, a collar having a recess, an upper surface, a projection extending above the upper surface, and channels communicating with the recess.