A construct (842) for heating a food item, comprising: a first panel (806) and a second panel (808) opposite one another, and a third panel (802) and a fourth panel (804) opposite one another, said panels being joined to one another, defining an interior space (852) and having a first end (848), a second end (850), and a length extending from the first end to the second end, the length of the first panel (806) being greater than the length of the second panel (808), the first end of the adjoined panels defining an opening, an oblique tear line (838) extending from the opening around the plurality of adjoined panels towards the second end (850) of the adjoined panels, at least one of the adjoined panels including microwave energy interactive material.