TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Reservoir: The pressure of vapor is higher than that of liquid at 30 degrees C temperature. The vapor pressure increases by 600% with temperature change between 20-55 degrees C. The vapor is non-flammable and refrigerant liquid comprises water.A flow restriction device is provided in the liquid supply reservoir which is exposed to exterior surface such that change in ambient temperature results in a change in the vapor pressure and is thermally isolated from cooling surface. The pressure within liquid pouch is greater than that inside rigid housing and is about 50 mbar to 500 mbar. The pressure inside rigid housing is 100-700 mbar and the pressure in vapor pouch is 100 mbar and is greater than that of rigid housing.Preferred Cooling Device: A wicking material is provided in the rigid housing to restrict the movement of the refrigerant liquid within the rigid housing. In an alternate arrangement, two reservoirs are provided to store different refrigerant liquids and actuators to flow liquid to evaporator at different flow rates. The reservoirs has different volumes. One reservoir has liquid comprising a freezing point suppression agent impregnated to wicking material in evaporator.The flow restriction device is comprised of a porous membrane disposed in or enclosing a reservoir. The average pore size of membrane is 0.05 micro m to 20 micro m. The flow restriction device has a capillary tube of diameter of 1-1000 micro m or a porous plug.In other arrangements, the flow restriction device comprises a gelling agent added to refrigerant liquid to increase viscosity of the liquid. The gelling agent comprises silica, polymers or starches. The freezing point suppression agent comprising salt or organic solvent is dispersed in the evaporator to lower the freezing point of the liquid.In another arrangement of cooling device, the vapor passageway is provided to permit vapor flow from the evaporator to the absorber, which comprises a thermally insulating material having thermal resistance in range of 2.8-6.5 Km2/W at a pressure of 4 mbar. The thermally insulating material is formed from open cell foam material and is selected from fiber glass and porous silica. The vapor passageway has thermally insulating material with several non-uniformly arranged apertures for vapor flow and the apertures are adjacent to liquid inlet. The aperture numbers is increased based on increase in distance between liquid inlet and apertures of cylindrical shape.The diameter of cylindrical apertures is 0.8-6.4 mm. The ratio between length and diameter of the apertures is 50:1-4:1. The evaporator comprises a planar evaporative surface whose perimeter is disposed with liquid inlet. The absorber comprises an absorptive material and a thermally conductive material disposed throughout the absorptive material and having high thermal conductivity than the absorptive material.The thermally conductive material has 1 W/mk of thermal conductivity and is made of particulate material selected from the group of graphite, fibrous carbon, alumina, copper, boron nitride, aluminum and mixtures and metallic fibrous material. The absorptive material comprises a desiccant having porous support material. The volume ratio of desiccant to thermally conductive material in the absorber is from about 100:1 to 10:1.In another arrangement, the absorber comprises a desiccant and the thermally conductive material.Preferred Temperature-Controlled Container: The absorber is disposed to dissipate heat generated in the absorber outside the cavity (2030) of product (2032). The absorber is integrated with top surface of the top case. The container is made to cylindrical or rectangular box, with contiguous or four side walls respectively. An insert incorporated with sorption cooling device is provided into the container. The reservoir is provided outside the cavity of the container.The top, bottom and side wall is made from any one of corrugated cardboard, expanded polystyrene and vacuum insulation panel. The sorption cooling device has a mass energy density of 100 W.hr/kg and volume energy density of 80 W.hr/m3.The absorber comprises a desiccant capable of absorbing 0.2 g of liquid per gram of desiccant at a vapor pressure of about 10 mbar. A valve is provided to supply liquid.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred High Vapor Pressure Substance: The preferred high vapor pressure substance is comprised of ethanol, methanol, isopropanol, n-butane, isobutane, n-pentane, n-hexane and fluorocarbons.    TECHNOLOGY FOCUS - POLYMERS - Preferred Thermally Insulating Material: The preferred thermally insulating material is made of polyurethane or polystyrene open cell foam.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Freezing Point Suppression Agent: The freezing point suppression agent is comprised of NaCl, CaCl2, BaCl2, MgCl2, FeCl3, Mg(NO3)2, NaBr, ZnCl2 and its mixtures.Preferred Desiccant: The preferred desiccant is comprised of zeolites, barium oxide, activated alumina, silica gel, glycerine, magnesium perchlorate, calcium sulfate, calcium oxide, activated carbon, calcium chloride, alumina gel, calcium hydride, phosphoric anhydride, phosphoric acid, potassium hydroxide, sodium sulfate and bentonite clay.Preferred Absorbent: The preferred absorbent is comprised from calcium chloride, lithium chloride, lithium bromide, magnesium chloride, calcium nitrate and potassium fluoride and mixtures.    TECHNOLOGY FOCUS - METALLURGY - Preferred Thermally Conductive Material: The preferred thermally conductive material is comprised of copper, low carbon steel, stainless steel, bronze, brass, aluminum, alloys and mixtures.