1.Double-wall stainless steel vacuum bottle: 2.Eco-friendly,durable,BPA free durable stainless steel vacuum bottle. 3.With high function of keep hot & hot more than 12 hours. 4.No any aluminium part to the newly bottle. 5.With neck screw inner bottle.Made of 18/8 stainless steel and PP fresh plastic lid in eco-friendly and healthy drinking. 6.Non-leaching to our bottles.