High temperature lava solar container

The essence of lava energy storage lies in its ability to maintain high temperatures over extended periods, making it a promising solution for energy balance during fluctuations in energy supply and demand. Is it possible in 21st century Earth for someone to create a small super insulated box to store heat like an "anti-freezer" such as putting lava inside the box and the box not being hot to the touch because it is so insulated yet inside the box contains molten lava? How small could this box be made. Thermal analyses of high-temperature solar thermal systems typically combine aspects of conduction,convection and radiation heat transfer modes. Lava energy storage medium refers to a novel and innovative approach to energy storage that utilizes heated lava or volcanic rock to store thermal energy. One particular system i d e n t i f i e d i n t h i s st ses are shown tfeasibility study of underground storage of solar energy as sensible heat.