The Asobu® Insulated “On the Rocks” Cooler is ideal for keeping your liquor chilled whether on the rocks or “neat”. The slim double wall vacuum Asobu® Insulated “On the Rocks” Cooler fits over the standard US made straight up Old Fashion rocks glass (1 included). It will keep your drink chilled, and is ideal for serving scotch, bourbon, vodka, gin, rum or other liquors straight up, with ice, or a mixer. Chill out with a nice hard drink that will remain chilled. Whether indoors or outdoors, enjoy the great taste of your favourite “on the rocks” liquor served perfectly chilled with the Asobu® Insulated “On the Rocks” Cooler! Set of 4 10.5 oz includes 2 Black & 2 Wood.