Container with liner

A container for heating a food product, the container comprising

• a base layer of material and a liner releasably attached to an inner surface of the base layer, wherein the liner is separable from the base layer after heating the container;
• a bottom panel;
• and
• a sidewall comprising at least an end panel foldably connected to the bottom panel and a side panel foldably connected to the bottom panel, wherein each of the end panel and the side panel extends along a corner of the container;
• and
• a flange extending outwardly from the sidewall;
• the sidewall comprising a lower portion extending along the bottom panel and an upper portion extending upwardly from the lower portion along an intermediate fold line, wherein the lower portion is oblique with respect to the bottom panel, the upper portion is oblique with respect to the lower portion, and the upper portion extends at an obtuse angle from the lower portion along the inner surface;
• wherein the end panel comprises a first lower edge extending along the lower portion of the sidewall from the bottom panel to the intermediate fold line and a first upper edge extending along the upper portion of the sidewall from the intermediate fold line to the flange, the side panel comprises a second lower edge extending along the lower portion of the sidewall from the bottom panel to the intermediate fold line and a second upper edge extending along the upper portion of the sidewall from the intermediate fold line to the flange, the first lower edge and the first upper edge abutting the respective second lower edge and second upper edge at the corner of the container.

In combination, a blank and a liner material for forming a container for heating a food product, the blank comprising:

• a bottom panel;
• an end panel foldably connected to the bottom panel and a side panel foldably connected to the bottom panel;
• the end panel and the side panel being for at least partially forming a sidewall comprising a lower portion extending along the bottom panel and an upper portion extending upwardly from the lower portion along an intermediate fold line when the container is formed from the blank and the liner material, wherein the lower portion is for being oblique with respect to the bottom panel and the upper portion is for being oblique with respect to the lower portion when the container is formed from the blank and the liner material;
• a first flange portion extending from the end panel and a second flange portion extending from the side panel, wherein the first flange portion and the second flange portion at least partially form a flange extending outwardly from the sidewall when the container is formed from the blank and the liner material;
• wherein the blank is for forming a base layer of the container, the liner material is for forming a liner that is releasably attached to an inner surface of the base layer when the container is formed from the blank and the liner material, and the liner is separable from the base layer after heating of the container formed from the blank and the liner material;
• wherein the end panel comprises a first lower edge extending from the bottom panel to the intermediate fold line and a first upper edge extending from the intermediate fold line to the first flange portion, the side panel comprises a second lower edge extending from the bottom panel to the intermediate fold line and a second upper edge extending from the intermediate fold line to the second flange portion, the first lower edge extends at a first angle with respect to the second lower edge, the first upper edge extends at a second angle with respect to the second upper edge, and the first angle is different than the second angle, the first lower edge and the first upper edge being for abutting the respective second lower edge and second upper edge at the corner of the container formed from the blank and the liner material;
• wherein, when the container is formed from the blank and the liner material, the upper portion of the sidewall is for extending at an obtuse angle from the lower portion of the sidewall along the inner surface.

A method of forming a container, the method comprising:

• obtaining a blank and a liner material, the blank comprising a bottom panel, an end panel foldably connected to the bottom panel, a side panel foldably connected to the bottom panel, a first flange portion extending from the end panel, and a second flange portion extending from the side panel, wherein the end panel comprises a first lower edge extending from the bottom panel to the intermediate fold line and a first upper edge extending from the intermediate fold line to the first flange portion, the side panel comprises a second lower edge extending from the bottom panel to the intermediate fold line and a second upper edge extending from the intermediate fold line to the second flange portion;
• forming the blank into an initial construct comprising folding the end panel and the side panel relative to the bottom panel so that the first lower edge and the first upper edge abut the respective second lower edge and second upper edge at a corner of the container and forming the first flange portion and the second flange portion into a flange;
• attaching at least a portion of the liner material to an inner surface of the initial construct so that the liner material and the initial construct form a respective liner and base layer of the container and so that the liner is releasably attached to the inner surface of the base layer by the heat seal layer, wherein the liner is separable from the base layer after heating the container;
• wherein the end panel and the side panel at least partially form a sidewall, the flange extending outwardly from the sidewall, the sidewall comprising a lower portion extending along the bottom panel and an upper portion extending upwardly from the lower portion along an intermediate fold line, wherein the lower portion is oblique with respect to the bottom panel, the upper portion is oblique with respect to the lower portion, and the upper portion extends at an obtuse angle from the lower portion along the inner surface.