cubitainer

Blend of cubical +‎ container or similar, 1950s marketing coinage by its inventor, Hedwin Corporation, Maryland.

cubitainer (plural cubitainers)

1. A semirigid cubical plastic container, typically used within a cardboard box.
   • 1968, Modern Packaging, volume 41, Morgan-Grampian, page 70:

     Cubitainer holds liquids, powders, grains & anything else that pours. Stacks compactly and stores more economically than other containers.

• box wine