US Patent 7051550 Thermal energy storage system

A thermal energy storage container which includes a first panel having a container attachment element located around a periphery thereof. The container attachment element is adapted to engage a complementary lid attachment element. The thermal energy storage container includes a container compartment adapted to store a thermal energy storage material. A thermal energy storage lid which includes a lid attachment element located around a periphery thereof. The lid attachment element is adapted to engage a complementary container attachment element.