A twist-collapsible storage box, which includes a soft rectangular box body, a bottom board mounted inside the box body and closely attached to the horizontal bottom wall of the box body, four horizontal rod members respectively fastened to the four vertical sidewalls of the box body in horizontal at...http://www.google.es/patents/US20070045311?utm_source=gb-gplus-sharePatente US20070045311 - Twist-collapsible storage box
