Double wall vacuum insulated perfection in a stemless wine tumbler made from lifelong Stainless Steel! Set off on your refreshing picnic, hiking or equestrian adventures with your water, wine, or cocktail icy-cold for 9 hours or your coffee and tea scalding-hot for over 3 hours! [Safe and Durable:]It is made from unbreakable 304 18/8 food grade stainless steel, with DOUBLE-WALL insulation and comes in vibrant colors, a special treatment that minimizes fading and chipping .