Abstract: A picnic cooler that includes a food compartment, a gas tank compartment, an off/on electric spigot, a first sealing rings with a first apertures a second sealing ring with a second aperture, and two cooling apparatuses. The cooling apparatus includes a twisting piping system and an upper metallic plate that serves as the bottom of the food compartment. The ratio between the diameter of the second aperture and the diameter of the first aperture is between 1.8 to 2.2 and the ratio between the inner surface area of the food compartment and the outer surface area of the first and second piping systems is between 9 to 17.

Abstract: A picnic cooler that includes a food compartment, a gas tank compartment, an off/on electric spigot, a first sealing rings with a first apertures a second sealing ring with a second aperture, and two cooling apparatuses. The cooling apparatus includes a twisting piping system and an upper metallic plate that serves as the bottom of the food compartment. The ratio between the diameter of the second aperture and the diameter of the first aperture is between 1.8 to 2.2 and the ratio between the inner surface area of the food compartment and the outer surface area of the first and second piping systems is between 9 to 17.

Abstract: A picnic cooler that includes a food compartment, a gas tank compartment, an off/on electric spigot, two sealing rings with fixed-size apertures, and two cooling apparatuses. The cooling apparatus includes a twisting piping system and an upper metallic plate that serves as the bottom of the food compartment.

Abstract: A picnic cooler that include a food compartment, a liquid-gas tank with an adapter, an electric spigot and a cooling apparatus. The food compartment includes a release aperture with unidirectional valve that is designed to release outside the gas. The cooling apparatus includes a twisting piping system and an upper metallic plate that serves also as the inner bottom of the food compartment and as a cooling plate. A second end of the twisting piping system includes a secondary aperture that is positioned inside the food compartment and that causes additional pressure drop and by that assists to cool the interior of the food compartment.

Abstract: A picnic cooler with a cooling mechanism based on the use of liquid nitrogen, that comprises four sides, bottom, cover, an internal compartment, an adapter. The internal compartment is integrated into one or more sides of the cooler and is made of a material that cools rapidly upon contact with the quick nitrogen. The internal compartment has one or more ventilation opening. The connector is designed to enable the attaching of an external canister of liquid nitrogen so as to enable introduction of liquid nitrogen from the canister into the internal compartment through the connector.