Abstract: Disclosed is an improved inner corner connector adapted to be secured at the intersections of container panels, such as walls, floors, and roofs. The inner corner connector includes a substantially horizontal base section with at least to substantially rigid flanges extending downward from the base section. The flanges are substantially parallel to each other and are spaced such that the resilient inner plate of a first panel snuggly fits between the two flanges. Extending upwards from the horizontal base are at least two flexible flaps that are configured to press against the inner plate of a second panel to create a thermal and moisture barrier at the intersection of the two panels. More than two flaps may be utilized to improve the quality of the thermal barrier, and the upper portions of the flaps may be joined together such that two flaps define an enclosed area.