Koozies perform a terrific perform, and so they perform it well: they keep your drink cold. Like the styrofoam cups of yore that at the moment are taking thousands and thousands of years to decompose in landfills, these weird artificial things have magical abilities to keep your drink chilly as heck for hours on end. An precise scientific research from the University of Washington that proves the efficacy of the koozie. First, researchers discovered that relative humidity factors more into…