Part number M11329-EK-006-D is nearly the same as the part number shown on the Apollo 11 stowage list,
M11329-EK-004-D-04, for “Container, Contingency Lunar Sample Return - Soft.” (See page 52 of the linked pdf.)
Based on the dash number, -006 compared to -004, perhaps this pouch is larger than the pouch used on the Apollo lunar missions.