Bladders and Boxes are best described by a manufacturer known as Hedwin Corporation and have so name this container Cubitainer.  It is sold either separately or assembled, but may only be considered UN approved if sold assembled.  It consits of  Linear LDPE inner bag, corrugated outer carton, cap, dust cover and handle (except for the quart size).  The other item that Hedwin manufactures is the 5-gallon/20-litre rectangular Hedpak.  It also comes either as a stand-alone or has a corrugated outer carton that makes it UN approved.