A refrigeration device , comprising: one or more walls substantially forming a liquid-impermeable container , the liquid-impermeable container configured to hold phase change material internal to the refrigeration device; at least one active refrigeration unit including a set of evaporator coils , the evaporator coils positioned within an interior of the liquid-impermeable container; one or more walls substantially forming a storage region ; at least one temperature sensor positioned within the liquid-impermeable container between the one or more walls and the set of evaporator coils; a controller operably attached to the at least one active refrigeration unit and to the temperature sensor; a compressor attached to the set of evaporator coils, wherein the controller is positioned between the compressor and a wire connection to an electric source and the controller is configured to send control signals to the compressor in response to data received from the temperature sensor; and a heat transfer system including a first group of vapor-impermeable structures with a hollow interior connected to form a condenser in thermal contact with the one or more walls substantially forming a liquid-impermeable container, a second group of vapor-impermeable structures with a hollow interior connected to form an evaporator in thermal contact with the one or more walls substantially forming the storage region, and a connector with a hollow interior affixed to both the condenser and the evaporator, the connector forming a liquid and vapor flow path between the hollow interior of the condenser and the hollow interior of the evaporator. one or more walls substantially forming a liquid-impermeable container , the liquid-impermeable container configured to hold phase change material internal to the refrigeration device; at least one active refrigeration unit including a set of evaporator coils , the evaporator coils positioned within an interior of the liquid-impermeable container; one or more walls substantially forming a storage region ; at least one temperature sensor positioned within the liquid-impermeable container between the one or more walls and the set of evaporator coils; a controller operably attached to the at least one active refrigeration unit and to the temperature sensor; a compressor attached to the set of evaporator coils, wherein the controller is positioned between the compressor and a wire connection to an electric source and the controller is configured to send control signals to the compressor in response to data received from the temperature sensor; and a heat transfer system including a first group of vapor-impermeable structures with a hollow interior connected to form a condenser in thermal contact with the one or more walls substantially forming a liquid-impermeable container, a second group of vapor-impermeable structures with a hollow interior connected to form an evaporator in thermal contact with the one or more walls substantially forming the storage region, and a connector with a hollow interior affixed to both the condenser and the evaporator, the connector forming a liquid and vapor flow path between the hollow interior of the condenser and the hollow interior of the evaporator. <EOS>