Discussion Forum—A Way with Words, a fun radio show and podcast about language

Warm cooler: Why is that beer jacket a 'koozie'?. One reason might be that cozy sounds off-kilter in the context of keeping something cold; the adjective cozy has always meant safe and snug, strongly implying warmth. And if you're selling koozies, a unique name - one that sounds cool-ish and doesn't evoke tea cozies - is clearly an improvement.