Come and Check Our Branding Solutions.It is made of food grade double walled stainless steel which is SUS304 for both inside and outside. the volumn is 18.59oz/550ml. It is convenient to carry it when you are traveling, driving and making sports. Can keep liquids warm or cold for long time. There are 12 colors available for your selection. Your logo and company name can be imprinted on the bottle for promotion. Pls check inventory and detailed info before placing your orders.