Paper-based or paperboard-based container and related methods

A paper-based or paperboard-based container for holding a pourable food product, comprising:

• a substantially planar bottom portion;
• a top portion arranged opposite the bottom portion and comprising a top panel and a top sealing region forming a top seal of the container;
• an opening device or closure being arranged in the top panel for dispensing and/or accessing the food product;
• and
• a wall portion extending between the bottom portion and the top portion and comprising a plurality of wall sections bordering the top panel and a longitudinal sealing band extending between the bottom portion and the top portion over at least one of the wall sections;
• wherein the top sealing region comprising a plurality of sealed sealing band panels, the top sealing region being folded onto said at least one of the wall sections comprising the longitudinal sealing band and being attached thereto, the top panel being free from sealing structures.