Coffee Joulies, Set of 5 Coffee is HOT; Joulies are cool; Take the edge off your coffee so it is safe to sip sooner and stays in the perfect temperature range longer Polished 18/10 stainless steel shell - just like high end silverware Food-based and completely nontoxic phase change material sealed inside absorbs and releases heat from your coffee Keeps your coffee at 140F (60C) - the perfect drinking temperature Made in USA from 85% recycled stainless steel using hydro power from Niagara Falls