parisbased cosmogen turned heads at luxe pack with its patented selfheating tube, designed for products like facial masks, antiwrinkle formulations, hair products and body oil. the cosmogen packaging incorporates two tubes, one inside the other. the outer tube is filled with the product formulation, and the hermetically sealed inner tube contains a sodium acetate solution. when the consumer breaks the peelable security strip on the package&rsquos closure, the sodium acetate solution starts to crystallize. this generates heat, warming up the product. the tubes are printed with red thermochromic ink, which provide a visual sign of the packaging&rsquos temperature change.