Abstract: A decorative device for application upon the exterior of an article of wearing apparel; the device comprising first and second sheets of transparent fluid impervious flexible material in registering relationship and being mutually secured in their marginal zones for jointly defining a central chamber. The decorative device is secured directly to the article of wearing apparel as by stitching and with there being a liquid of predetermined coloration and either of foaming or nonfoaming character partially filling the chamber for exception through the walls of said device. The liquids utilized are of predetermined formulation to possess the capacity to foam or otherwise so that upon movement of the wearer of the article of wearing apparel the liquid will be caused to flow within the confined chamber.