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