Good Bottle Since OKADI OKADI is a new but vigorous, creative brand with more than 20-year experience in manufacturing all kinds of Double Wall Stainless Steel Insulated Vacuum Water Bottle. We are specializing in inventing new technology and new product all the time. OKADI now have more than 2000 staffs covering an area of 48000 square meters. What’s more, OKADI owns 255 patents and our products in have been certificated by LFGB. OKADI will provide better products and better service for our customers. DOUBLE WALL INSULATION The material in liner adopts high quality 304 stainless steel and for outer is 201 stainless steel material. Then bottles vacuum insulation creates an airless space between two walls, which will keep the hot or cold drink in bottle insulated and keep hot or cold for a long time. FOOD GRADE AND BPA FREE No matter the silicone seal in the lid or the plastic material in handle and the paint we use are all passed FDA test and safe for adults and children. Totally green and eco-friendly! You can purchase OKADI Flask with complete confidence.