A packaging article comprising a container and a lid arranged to be mounted on the container to seal the contents of the container, a. said container defining a volume with an opening and a first outwardly protruding circumferential flange arranged around the periphery of the opening, b. said lid comprising a central portion and a rim portion arranged at the periphery of the central portion with an upper edge of the rim portion being raised above said central portion, said rim portion comprising a first downwardly facing U-shaped circumferential groove arranged to accommodate the first outwardly protruding circumferential flange of the container when the lid is mounted on the container, c. the container comprising a second outwardly protruding circumferential flange , said second outwardly protruding circumferential flange being arranged around the periphery of the opening and inside the first outwardly protruding circumferential flange and such that the upper edge of the first outwardly protruding circumferential flange is higher than the upper edge of the second outwardly protruding circumferential flange , characterized in that d. the rim portion of the lid comprises a second downwardly facing U-shaped circumferential groove arranged to accommodate the second outwardly protruding circumferential flange when the lid is mounted on the container, said second downwardly facing U shaped circumferential groove being arranged on the inside of the first downwardly facing U shaped circumferential groove of the rim portion of the lid, and in that e. the rim portion of the lid comprises a flexible sealing material, for example a gasket , arranged in the second downwardly facing U shaped circumferential groove . a. said container defining a volume with an opening and a first outwardly protruding circumferential flange arranged around the periphery of the opening, b. said lid comprising a central portion and a rim portion arranged at the periphery of the central portion with an upper edge of the rim portion being raised above said central portion, said rim portion comprising a first downwardly facing U-shaped circumferential groove arranged to accommodate the first outwardly protruding circumferential flange of the container when the lid is mounted on the container, c. the container comprising a second outwardly protruding circumferential flange , said second outwardly protruding circumferential flange being arranged around the periphery of the opening and inside the first outwardly protruding circumferential flange and such that the upper edge of the first outwardly protruding circumferential flange is higher than the upper edge of the second outwardly protruding circumferential flange , characterized in that d. the rim portion of the lid comprises a second downwardly facing U-shaped circumferential groove arranged to accommodate the second outwardly protruding circumferential flange when the lid is mounted on the container, said second downwardly facing U shaped circumferential groove being arranged on the inside of the first downwardly facing U shaped circumferential groove of the rim portion of the lid, and in that e. the rim portion of the lid comprises a flexible sealing material, for example a gasket , arranged in the second downwardly facing U shaped circumferential groove . <EOS>