The invention relates to a flexible shipping container (10) for bulk material, comprising a carrying bag (1) having a bottom (3) with at least one pocket (2.1, 2.2, 2.3) or flap (27) attached to it, such that a flat stiffening element can be inserted between the bottom and the pocket (2.1, 2.2, 2.3)...http://www.google.es/patents/US6447165?utm_source=gb-gplus-sharePatente US6447165 - Shipping container that can be stiffened
