A packaging container for a pressurized, liquid food, the packaging container being formed from a packaging laminate which includes at least one core layer of paper or paperboard displaying one major fibre orientation in a first direction thereof. According to the invention, said core layer is pre-strained in a second direction which is substantially at right angles to said first direction, with a view to reducing or eliminating expansion in the finished, filled packaging container during storage thereof. The present invention also encompasses a packaging laminate for the packaging container, as well as a method of producing the packaging container.