Duo Deluxe Bottle (Milton)Features: Thermosteel bottles are vacuum insulated with inner and outer steel, keeping beverages hot or cold for 24 hours. The bottles are durable, user friendly, and come with a flip lid that doubles as a cup. The product has a 1 year warranty and is made from 304 Grade stainless steel, making it leak proof, durable, unbreakable, and rust proof. The unique design of the bottle allows for hassle free and spill free pouring. The bottle is versatile and