This St. Patrick’s Day Can Cozy Crochet Pattern is a fun, easy pattern for a lucky green hat that is also a crochet beer can cozy! This Saint Patrick’s Day Crochet Can Cozy Pattern makes a can cozy (sometimes called a koozie or cosy) that holds a standard 12 fl. oz / 355 ml beer can (or soda / pop can). It’s a great St. Paddy’s Day crochet gift idea!