FIELD: packaging industry.
SUBSTANCE: blow moulded container comprises an inner container and an outer container with surfaces facing each other. Surfaces are designed to separate from each other. At least part of at least one of the facing surfaces has a roughness of more than about 0.1 Ra, and/or difference in roughness of said facing surfaces of at least one part thereof is more than about 0.1 Ra.
EFFECT: group of inventions provides easy separation of said surfaces with a decrease in the pressure of the gas supplied between the containers.
28 cl, 14 dwg, 4 tbl, 1 ex
