Custom Can Coolers, Koozie Duo Can Cooler - Slim & Regular Can, Everything is more fun with Koozie can coolers! And this style does double duty with its elastic sides, holding both traditional 12 oz cans and 12 oz slim cans, too. Folds flat to fit in your pocket or bag, so wherever you are, your drink will stay cooler longer. It's classic, authentic and genuine: THE Koozie Collapsible Can Kooler Ideal for mailings Patent Pending Fits a slim 12 oz can and a traditional 12 oz can or bottle ... #46345 $2.47/each.