A thermal insulating structure comprising a top, a bottom, first and second sides, a thermal insulating material, and a first transverse member is contemplated. The thermal insulating material is disposed between the first and second sides. The first transverse member comprises a plurality of apertures, which thereby provides less material of the transverse member for heat transfer compared to an identical transverse member with no apertures. Thus, the path for heat transfer through the first transverse member is restricted and the effect of an undesirable “hot spot” is reduced or eliminated.