Container having a sealed compartment

A method of forming a packaged aerosol-generating article, the method comprising:

• providing a first web of substrate material;
• positioning an aerosol-generating article on the first web of substrate material;
• providing a second web of substrate material;
• positioning the second web of substrate material over the aerosol-generating article and the first web of substrate material;
• securing a first portion of the first web of substrate material to a first portion of the second web of substrate material to form a compartment region, wherein a perimeter of the compartment region is completely sealed to form a sealed compartment, and wherein the aerosol-generating article is contained within the sealed compartment;
• securing a second portion of the first web of substrate material to a second portion of the second web of substrate material to form an access region directly adjacent to the compartment region, wherein the access region comprises an unsealed area, wherein a perimeter of the access region extends around the unsealed area, wherein the first substrate layer is attached to the second substrate layer at the perimeter of the access region, and wherein the unsealed area is separated from the sealed compartment by the completely sealed perimeter of the compartment region;
• forming a line of weakness extending at least partially within the unsealed area of the access region, wherein the line of weakness is a first line of weakness in the first substrate layer only, the container further comprising a second line of weakness in the second substrate layer only, wherein the second line of weakness has a different shape to the first line of weakness, wherein the difference in shape between the first line of weakness and the second line of weakness defines a closure tab in the second substrate layer in the unsealed area of the access region, and wherein the difference in shape between the first line of weakness and the second line of weakness is such that a part of the first substrate layer may be tucked underneath the closure tab to retain the first substrate layer in a closed position;
• and
• cutting the first web of substrate material and the second web of substrate material to form a packaged aerosol-generating article, the packaged aerosol-generating article comprising the aerosol-generating article and a container comprising a first substrate layer, a second substrate layer, the compartment region, the access region and the line of weakness.