Method of making packaging container for bulk solids

A method of making a packaging container for bulk solids, said method comprising:

• assembling a container wall to a container bottom to form a container body, the container wall extending from the container bottom to a container opening in a height direction of said container, said container wall having wall portions and curved corner portions, said container wall and said container bottom delimiting an inner space in said container;
• attaching a first sealing membrane to an inner surface of said container wall so as to form a roof over a first inner compartment in said inner space, said first sealing membrane being peelable or tearable via a gripping member of said first sealing membrane such that at least a portion of said first sealing membrane can be removed from said container body to provide access to said first inner compartment;
• attaching a second sealing membrane to said inner surface of said container wall between said first sealing membrane and an edge of said container opening, said first sealing membrane forming a floor of a second inner compartment in said inner space and said second sealing membrane forming a roof over said second inner compartment, said second sealing membrane being peelable or tearable via a gripping member of said second sealing membrane such that at least a portion of said second sealing membrane can be removed from said container body to provide access to said second inner compartment;
• and
• affixing a rim and a lid to the container body such that the rim is affixed to said container body along said edge of said container opening and the lid is arranged to engage with said rim to form a closure on said packaging container.