PCT No. PCT/AU92/00472 Sec. 371 Date Mar. 7, 1994 Sec. 102(e) Date Mar. 7, 1994 PCT Filed Sep. 4, 1992 PCT Pub. No. WO93/04954 PCT Pub. Date Mar. 18, 1993A floor mat and a container liner which incorporates the floor mat are used in shipping containers that are used to transport compactible powders. The floor mat comprises an upper planar non-flexible sheet and a lower gas impermeable planar sheet held in spaced apart superimposed relationship by a plurality of rigid ribs which extend between the upper and lower planar sheets to form an array of channels that extend substantially the full area of the floor mat. The channels are opened at one end and closed at the other. A gas manifold has an upper portion and a lower portion, each of which join respectively to the upper and lower planar sheets about the open ends of the channels in a manner so as to enable a flow of gas to be provided thereto. The floor mat is secured to the container when in use. The upper planar sheet and the upper portion of the manifold have a plurality of micro-perforations.
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