Abstract: A storage and mixing apparatus for storing and mixing a substantially flowable substance that includes a container formed from a folded flexible sheet incorporating releasably sealed enclosure seams. The flexible sheet is unfoldable along a plurality of fold seams into a mixing mat, which has a basin portion. The mixing mat also includes a periphery that incorporates at least one releasably engagable basin former that is configured to form the periphery into a circumferential riser when the at least one basin former is engaged. The basin former can be incorporated into the periphery and may be formed with a raceway received with a cinch cord operative to form the riser when drawn. In the alternative, the periphery may be folded along the plurality of fold seams to form the riser from opposing walls. In this configuration, the at least one basin former can be adapted to releasably engage the opposing walls to form a basin from the basin portion and the opposing walls.

Abstract: A storage and mixing apparatus for storing and mixing a substantially flowable substance that includes a container formed from a folded flexible sheet incorporating releasably sealed enclosure seams. The flexible sheet is unfoldable along a plurality of fold seams into a mixing mat, which has a basin portion. The mixing mat also includes a periphery that incorporates at least one releasably engagable basin former that is configured to form the periphery into a circumferential riser when the at least one basin former is engaged. The basin former can be incorporated into the periphery and may be formed with a raceway received with a cinch cord operative to form the riser when drawn. In the alternative, the periphery may be folded along the plurality of fold seams to form the riser from opposing walls. In this configuration, the at least one basin former can be adapted to releasably engage the opposing walls to form a basin from the basin portion and the opposing walls.