A blank (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100) for forming a microwave heating construct, comprising: a plurality of adjoined panels, each panel of the plurality of adjoined panels having a first dimension extending in a first direction and a second dimension extending in a second direction substantially perpendicular to the first direction, the plurality of adjoined panels including a main panel (102, 302, 402, 502, 602, 802, 902, 1102), a first minor panel (106, 206, 306, 406, 506, 606, 806, 906) joined to the main panel, a second minor panel (108, 208, 308, 408, 508, 608, 708, 808, 908) joined to the main panel, and a major panel (104a, 304a, 404a, 504a, 604a, 804a, 904a) joined to the first minor panel, wherein the main panel, the first minor panel, the second minor panel, and the major panel are joined respectively to one another along a plurality of respective substantially parallel fold lines (110, 112, 114, 910, 912, 914) extending in the first direction, and an end panel (136, 1036) joined to the main panel along a substantially arcuate fold line extending generally in the second direction, the end panel having an end edge opposite the arcuate fold line; and a microwave energy interactive element overlying at least a portion of at least one of the adjoined panels, characterized in that the second dimension of the end panel increases from the arcuate fold line to the end edge. a plurality of adjoined panels, each panel of the plurality of adjoined panels having a first dimension extending in a first direction and a second dimension extending in a second direction substantially perpendicular to the first direction, the plurality of adjoined panels including a main panel (102, 302, 402, 502, 602, 802, 902, 1102), a first minor panel (106, 206, 306, 406, 506, 606, 806, 906) joined to the main panel, a second minor panel (108, 208, 308, 408, 508, 608, 708, 808, 908) joined to the main panel, and a major panel (104a, 304a, 404a, 504a, 604a, 804a, 904a) joined to the first minor panel, wherein the main panel, the first minor panel, the second minor panel, and the major panel are joined respectively to one another along a plurality of respective substantially parallel fold lines (110, 112, 114, 910, 912, 914) extending in the first direction, and an end panel (136, 1036) joined to the main panel along a substantially arcuate fold line extending generally in the second direction, the end panel having an end edge opposite the arcuate fold line; and a main panel (102, 302, 402, 502, 602, 802, 902, 1102), a first minor panel (106, 206, 306, 406, 506, 606, 806, 906) joined to the main panel, a second minor panel (108, 208, 308, 408, 508, 608, 708, 808, 908) joined to the main panel, and a major panel (104a, 304a, 404a, 504a, 604a, 804a, 904a) joined to the first minor panel, wherein the main panel, the first minor panel, the second minor panel, and the major panel are joined respectively to one another along a plurality of respective substantially parallel fold lines (110, 112, 114, 910, 912, 914) extending in the first direction, and an end panel (136, 1036) joined to the main panel along a substantially arcuate fold line extending generally in the second direction, the end panel having an end edge opposite the arcuate fold line; and a microwave energy interactive element overlying at least a portion of at least one of the adjoined panels, characterized in that the second dimension of the end panel increases from the arcuate fold line to the end edge. the second dimension of the end panel increases from the arcuate fold line to the end edge.