Classic can coolers with a twist! The heat sensitive neoprene material of this fun beverage holder changes colors by the heat of your hand. If the cooler changes color, you know it is time for a fresh cold beverage! These improved can coolers are made of durable yet flexible neoprene fold quickly and easily and will keep beverages cooler longer. The koolies are available in a large selection of vibrant colors! Collapsible design folds flat for pocket or purse storage.